4/10/24
RESPONSE AND CHEMICAL COORDINATION IN PLANTS AND ANIMALS
1) Identify which of the following statement is not true regarding adrenaline--
a) increase the rate of heartbeat
b) helps in the production of the spermatozoa during adolescence
c) increase cardiac output
d) increases systolic blood pressure.
2) Select the correct pair-
a) cerebrum- maintenance of balance of the body.
b) hypothalamus - control of intelligence and emotion
c) cerebellum- control of body temperature
d) medulla oblongota- control of heartbeat and swallowing of food.
3) Identify which of the following statements is not true regarding insulin-
a) helps in the absorption of glucose from blood into most of the somatic cells.
b) converts glucose into glycogen within liver and muscle cells.
c) helps in the conversion of fat and protein into glucose
d) inhibats the conversion of protein and fat into glucose.
4) Read the following sentence and identify the sentence which is not correct-
a) FSH, LH and prolactin are different types of GTH
b) adrenaline decrease cardiac output
c) insulin facilitates the absorption of glucose into the cell through cell membrane
d) Progesterone helps in the formation of placenta in female body
5) In case of women, the Follicle Stimulating Hormone which stimulates Graffian Follicle of the Ovary to secrete the hormone, is
a) TSH b) ADH c) Oestrogen d) ACTH
6) A person affected with Diabetes Mellitus is unable to secrete which of the following hormones in adequate quantity ?
a) Adrenaline b) Insulin c) Thyroxine d) Testosterone
7) Which of the following hormones is related with Diabetes Insipidus?
a) STH b) ADH c) Oxytocin d) ICSH
8) Which of the following is not a source of Auxin?
a) Apical meristematic cell
b) Immature leaves
c) Buds d) coconut milk
9) Which of the following is not a sex hormone ?
a) testosterone b) Insulin c) Oestrogen d) Progesterone
10) Which of the following is the source of Gibberellin?
a) Apple
b) the endosperm of the maize
c) coconut water
d) the cotyledons of seed and germinating seed
11) Which of the following is not the function of Oestrogen
a) Express sexual character during puberty
b) fat deposition under the skin
c) to prepare uterine wall for implanting fertilized egg
d) controls menstrual cycle
12) The mixed gland is-
a) thyroid b) adrenal c) pancreas d) pituitary
13) Which of the following animal hormone is not secreted from Anterior pituitary?
a) GTH b) STH c) TSH d) Testosterone
14) The hormone of the emergency is
a) insulin b) Adrenaline c) thyroxine d) oestrogen
15) Which of the following instruments measures the secretion of plant ?
a) Microscope b) seismograph c) telescope d) Cresscograph.
16) The secretion of oestrogen is controlled by the secretion of
a) FSH b) LH c) ACTH d) ADH
17) Which of the following is not the function of Adrenaline hormone ?
a) control a blood pressure
b) control of sweating
c) control of respiration rate
d) to control the fertilizing capacity of sperms
18) What is the function of CSF ?
a) controls intelligence
b) maintenance pressure within the skull
c) controls eating
d) controls reflex action
19) Which hormone controls the secretion of thyroxine ?
a) ACTH b) STH c) TSH d) FSH
20) Which of the following is the site of function of Gibberellin?
a) apical meristematic cell
b) immature leaves
c) buds d) coconut milk
21) which hormone is secreted at a faster rate while a person is frightened ?
a) GH b) GTH c) thyroxine d) adrenaline
22) Which of the following hormones controls the amount of glucose in blood ?
a) insulin b) TSH c) FSH d) none.
23) Which hormone delay leaf senescence?
a) Auxin b) Gibberellin c) cytokinin d) IAA
27/9/24
A) State whether the following statements are true or false:
1) Grey matter of brain is located on its surface while white matter is present in the centre.
2) Cerebrum is responsible for balancing in posture .
3) Cerebellum is the bigger part of the brain.
4) The voluntary functions of the body are under the control of medulla oblongata.
5) Cerebrum is the centre of memory and learning.
6) Spinal cord is protected within the bony cranium .
7) The spinal cord controls the most of the involuntary actions of the body.
8) Dendrites of neurons receive messages from the other neurons and pass to the axon.
9) Axon conduct messages away from the neuron for response.
10) Axon terminal have knob-like structures at their tips which store chemicals for transmission of messages.
11) A nerve impulse always travels from dendrites to axon.
12) Reflex actions are the quickest actions to a stimulus.
13) Sneezing and yawning are reflex actions of the human body.
14) Brain receives message through sensory nerves.
15) Muscles can receive signal only from brain to move in a response to stimulus.
16) Cell body of a neurone lacks cell organelles expect nucleus.
17) Both brain and spinal cord are covered by meninges.
18) Brain is protected by a bone cranium.
19) Nodes of Ranvier are present only in nerves with myelin sheath.
20) An axon conduct the nerve impulse away through dendrites.
21) Salivation on smell of food is a reflex action.
B) Choose the correct option:
1) cerebellum is the part of the brain which is responsible for
a) interpreting sensations
b) conducting reflexes in the body.
c) maintaining posture and equilibrium.
d) controlling thinking, memory and resoning
2) Which one of the following is a reflex action ?
a) playing in guitar
b) applying sudden brakes when a dog crosses the path.
c) Tying one's shoe lace
d) riding a bicycle
3) The largest part of the brain is responsible for
a) thinking and memory
b) balancing the body
c) regulation of blood pressure
d) swallowing of food
4) grey matters spinr cord is located
a) on the periphery
b) in the centre
c) on the surface
d) everywhere
5) A nerve impulse in a neuron travels from
a) axon to a cell body
b) Dendrites to axon
c) cell body to dendrites
d) cell body to axon
6) In a reflex action, muscles have a role of
a) stimulus b) impulse c) receptor d) effector
C) Fill in the blanks:
1) Brain sends information to effectors via____ nerves.
2) A neuron always receives the nerve impulses by____.
3) Axon terminals store chemicals in knob-like structures present at their____.
4) Axons of some neurons are covered by a white____ sheath .
5) A _____is a bundle of nerve fibres enclosed in a sheath .
6) The branched structure of dendrites increases its____.
D) Match the colum
Column
1) cerebellum
2) cerebram
3) Medulla oblongota
4) Axon
5) Spinal cord
Column
a) vertebral column
b) branched
c) balance
d) memory
e) brainstem
E) Pick the odd one out:
1) memory, balance, thinking, cerebrum
2) Dendrites , Axon, myelin sheath, nodes of Ranvier.
F) Name the following:
1) A white sheath present around some nerve axons.
2) part of the brain responsible for sensory perception.
3) part of the brain which continues as spinal cord.
4) small canal present in the centre of spinal cord.
5) The organs which receive the message from the brain or spinal cord and respond.
26/8/24
CELL CYCLE, CELL DIVISION AND STRUCTURE OF CHROMOSOMES
1) Name the following:
a) The process by which two or more daughter cells are produced from a single mother cell.
b) The first gap or growth phase of cell cycle.
c) A simple process of cell division occurring in prokaryotic cells like bacteria.
d) The process by which reproductive cells divide.
e) Another name of somatic cell division.
f) The process of nucleus.
g) The process of division of cytoplasm.
h) A cell stage when the cell plate begins in the centre and moves towards the cell wall.
i) The stage in mitosis when the nucleolus starts disappearing.
2) Mention whether the following statements are true or false:
a) Mitosis is also known as reductional cell division.
b) Daughter cells produced by mitosis have the same number of chromosomes as the mother cell.
c) All sexually reproducing organisms undergo amitosis.
d) Plastids and endosplasmic reticulum disappear during prophase of mitosis.
e) Division of centromere takes place during metaphase .
f) Body cells of man and woman have 23 chromosomes.
g) Chromosomes were first discovered by Walter Fleming in 1882.
h) 2n represents haploid number of chromosome.
i) Lowest number of chromosomes can be found in housefly.
j) Both DNA and RNA are polymers nucleotides.
3) Fill in the blanks with appropriate words :
a) Rod shaped chromosome having centromeo at one end is called _____.
b) Actual configuration of a DNA is ______which looks somewhat like a spiral staircase.
c) The largest chromosomes is____ and is found in_____.
d) Bundle of microtubule fibres radiating from the each pole during cell division is known as____
e) _____is an increase in size or mass of a developing or living organism.
4) Match the column
COLUMN A
a) Meiosis - I
b) Polytene chromosome
c) Barr body
d) Lampbrush chromosomes
COLUMN B
i) Dipteren insect
ii) Amphibian oocyte
iii) Inactive X chromosome
iv) Reductional division
5) Choose the most appropriate answers:
a) The main difference between a dividing animal cell and plant cell lies in
i) Prophase ii) Metaphase iii)? Anaphase iv) cytokinesis
b) The number of chromosome present in pollen grains in six. What should be their number in a leaf Cell
i) 6 ii) 24 iii) 12 iv) 3
c) Un animal cell , the spinal fibres arise from
i) centriole ii) Mitochondria iii) Golgi body iv) Nucleus
d) What is the proper sequence in mitosis ?
i) telophase , anaphase, prophase , and metaphase
ii) anaphase, telophase, metaphase, prophase
iii) prophase, metaphase, anaphase, telophase
iv) metaphase, prophase, anaphase, telophase
6) Difine the following:
a) Mitosis
b) Meiosis
c) Centromere
d) Crossing over
e) Chiasmata
f) Hetrochromatin
g) Karyotype
h) Idiogram
i) Kinetochore
7) Give five difference between mitosis and meosis.
8) What is cytokinesis ?
9) Name the different stages of a cell cycle p.
10) What is interface ?
11) Name the type of cytokinesis in plant cell.
12) What is a gene ?
13) How does Meiosis create variation in a population ?
14) What is DNA double helix ?
15) Explain what changes occur in a Cell during the S and G₂ phases of cell division.
16) If the number of chromosomes in a Cell 2n= 4, draw the same cell in metaphase of mitosis.
17) Draw a neat labelled diagram of prophase and anaphase stages in an animal cell.
18) With the help of neat sketches, show how cytokinesis differ in a plant cell from an animal cell.
19) The diagram given below represents stage during cell division. Study the same and then answer the questions that follow:
a) Name the parts level 1, 2 and 3.
b) identify the above stage and give reason to support your answer.
c) where does in the body this type of cell division occur.
d) name the state prior to this stage and draw a diagram to represent the same.
20) Write the correct sequence of different stages of cell cycle and draw well labelled diagram of it.
21) Draw the structure of a Chromosome. Label all the parts.
22) Given diagram is of a double helical structure of DNA :
a) Name the four nitrogenous bases that form a DNA molecule.
b) Give the full form of DNA.
c) Name the unit of heredity.
d) Mention two points of differences between Mitosis and Meiosis.
23) Given diagram representing a stage during mitotic cell division in an animal cell:
a) Identify the above stage. Give a reason to support your answer.
b) Name the parts labelled 1, 2, 3 and 4 .
c) What is function of part 3 ?
d) Name the stage that comes after the stage shown in the diagram. Draw a well labelled diagram of this stage
Time allowed: Two hours. Max. Marks: 80
------------------------------------------------------------
Answer to this paper must be written on the paper provided separately .
You will not be allowed to write during the first 15 minutes.
This time is to is spent in reading the question paper.
The time given at the head of this Paper is the time allowed for writing the answers .
------------------()--------------()---------
Section A is compulsory. Attempt any four questions from section B.
The intended marks for questions or parts of questions are given the bracket [ ].
____________----------___________
Question 1: Choose the correct answers to the questions from the given options: [15]
(Do not copy the questions, write the correct answers only)
i) An element in period 3, whose electron affinity is zero.
a) neon b) sulphur c) sodium d) argon
ii) An element with the largest atomic radius among the following is:
a) Carbon b) nitrogen c) lithium d) beryllium
iii) The compound that is not an ore of aluminium:
a) cryolite b) Corundum c) Fluorspar d) Bauxite
iv) The vapour density of CH₃OH is ____. (At. Wt. C=12, H= 1, O= 16)
a) 32 b) 18 c) 16 d) 34
v) Which of the following reactions takes place at the anode during the electroplating of an article with silver?
a) Ag - 1e⁻ --> Ag¹⁺
b) Ag+ 1e⁻ --> Ag¹⁻
c) Ag - 1e⁻ --> Ag d) none
vi) The metallic hydroxide which forms a deep blue solution with excess Ammonium hydroxide solution is:
a) Fe(OH)₂ b) Cu(OH)₂ c) Ca(OH)₂ d) Fe(OH)₃
vii) An example of a cyclic organic compound is :
a) propene b) Pentene c) Butane d) Benzene
viii) In the laboratory preparation, HCL gas is dried by passing through:
a) dilute nitric acid
b) concentric sulphuric acid
c) dilute sulphuric acid
d) acidicfied water
ix) The nitrate which on thermal decomposition leaves behind a residue which is yellow when hot and white when cold:
a) Lead nitrate b) Ammonium nitrate c) copper nitrate d) Zinc nitrate
x) The salt when concentrated sulphuric acid reacts with KNO₃ above 200°C:
a) K₂SO₄ b) K₂SO₃ c) KHSO₄ d) KHSO₃
xi) The property exhibited by concentrated Sulphuric acid when it is used to prepare hydrogen chloride gas from Potassium chloride:
a) dehydrating property
b) drying property
c) oxidizing property
d) non-volatile acid property
xii) The hydrocarbon formed when sodium propanate and soda lime are heated together:
a) methane b) ethane c) ethene d) propane
xiii) The acid which does not form acid salt by a basic radical.
a) H₂CO₃ b) H₃PO₄ c) H₂SO₄ d) CH₃COOH
xiv) The general formula of hydrocarbons with single covalent bond is:
a) CₙH₂ₙ₊₂ b) CₙH₂ₙ c) CₙH₂ₙ₋₂ d) CₙH₂ₙ₋₆
xv) The indicator which changes to pink colour in an alkaline solution is:
a) blue litmus b) methyl orange c) red litmus d) phenolphalein
Question 2: [5]
A) Match the column
Column A
a) sodium chloride
b) methane
c) hydrogen chloride gas
d) Oxidation reaction
e) water
Column B
i) has two shared pair of electrons
ii) has high melting and boiling points
iii) a greenhouse gas
iv) has low melting and boiling points
v) Zn - 2e⁻ --- Zn²⁺
vi) S + 2e⁻ ---> S²⁻
B) The following sketch illustrates the process of conversion of Alumina to aluminium:
Study the diagram and answer the following : [5]
a) Name the constituent of the electrolyte mixture which has a divalent metal in it.
b) Name the Powdered substance 'X' sprinkled on the surface of the electrolyte mixture
c) What is the name of the process ?
d) Write the reactions taking place at the electrodes 'Y' (anode) and 'Z' (cathode) respectively.
C) Fill in the blanks with the choice given the brackets: [5]
a) metals are good_____(oxidizing agents/ reducing agents)
b) non-polar covalent compounds are_____ (good/bad) conductors of heat and electricity.
c) higher the pH value of a solution, the more____ (acidic/alkaline) it is.
d) ____(silver chloride/ Lead chloride) is a white precipitate that is soluble in excess of Ammonium hydroxide solution.
e) conversion of ethene to ethane is an example of____.( hydration/ hydrogenation)
D) State the terms/process for the following: [5]
a) The energy released when an atom in the gaseous state accepts an electrons to form an anion.
b) tendency of an element to form chains of identical atoms.
c) the name of the process by which ammonia is manufactured on a large scale.
d) a type of salt formed by partial replacement of hydroxyl radicals with an acid radical.
e) the ratio of the mass of a certain volume of gas to the same volume of hydrogen measured under the same conditions of temperature and pressure.
E)a) Give the structural formula of the following organic compounds: [5]
i) 2-chlorobutane
ii) Methanol
iii) But-2-yne
b) Give the IUPAC name of the following organic compounds:
SECTION - B (40 Marks)
(Attempt any four questions from this section)
___________________''________________
Question 3
i) Identify the cation each of the following cases : [2]
a) ammonium hydroxide solution when added to Solution B gives a white precipitate which does not dissolve in excess of Ammonium hydroxide solution
b) sodium hydroxide solution when added to solution C gives a white precipitate which is insoluble in excess of sodium hydroxide solution.
ii) Fill in the blanks by choosing the correct answer from the brackets : [2]
a) during electrolysis, the compound____ in its molten state liberates brown fumes at the anode. (NaCl/PbBr₂).
b) the ions which could be discharged most readily during electrolysis is____(Fe²⁺/Cu²⁺)
iii) arrange the following as per the instruction given in the brackets: [3]
a) Al, K, Mg, Ca (decreasing order of its reactivity)
b) N, Be, O, C. (increasing order of a non metallic character)
c) P, Si, F, B (decreasing order of valence electrons)
iv) complete and balance the following equations: [3]
a) NH₄Cl + Ca(OH)₂--->
b) CuSO₄ + NH₄OH--->
c) Cu+ conc. HNO₃--->
4) i) State a relevant reason for the following: [2]
a) Hydrogen chloride gas cannot be dried over quick lime
b) Ammonia gas is not collected over Water.
ii) identify the alloy in each case from the given composition: [2]
a) aluminium, magnesium, manganese, copper
b) iron, nickel , chromium, carbon.
iii) Solve the following numerical problem: [3]
Ethane burns on Oxygen according to the chemical equation :
2C₂H₆ + 7H₂O---> 4CO₂ + 6H₂O
If 80 ml of ethane is burnt in 300 ml of oxygen, find the composition of the resultant gaseous mixture when measured at room temperature.
iv) The following questions are pertaining to the laboratory preparation of Ammonia gas from Magnesium nitride. [3]
a) Write a balanced chemical equation for its preparation .
b) why is this method seldom used ?
c) How do you identify the gas formed ?
Question 5
i) Write one use of the following alloys: [2]
a) Bronze
b) Fuse metal
ii) Draw the electron dot structure for the following: [2]
a) ammonium ion
b) A molecules of a nitrogen (At.no: N=7, H =1)
iii) Give a balanced chemical equation for the following conversions with condition: [3]
a) Ethene from ethanol
b) Ethyne from calcium carbide
c) monochloromethane from methane
iv) Study the following observations and name the anions present in the each of the reactions. [3]
a) When a crystalline solid P is warmed with concentrated H₂SO₄ and copper turnings a reddish brown gas is released.
b) When few drops of Dil. sulphuric acid is added to Salt R and heated a colourless gas released which turns moist lead acetate paper silvery black.
c) When few drops of a barium nitrate solution is added to the salt solution Q, a white precipitate is formed which is insoluble in HCl.
Question 6
i) Define/state: [2]
a) Electronegativity
b) Guy-Lussac's Law of combining volumes
ii) The empirical formula of an organic compounds is CHCl₂. [2]
If its relative molecular mass is 168. What is its molecular formula ?
(At. Wt: C=12 , H= 1, Cl= 35.5)
iii) Choose the substance give in the box below to answer the following questions:
(iron, magnesium sulphide, zinc, sodium sulphide , lead, ferric chloride, copper, ferrous sulphate). [3]
a) The metal that will not produce hydrogen gas when reacted with dilute acids.
b) The compound that will produce Sulphur dioxide gas when reacted with dilute HCl.
c) The solution of this compound produces dirty green percipitate with NaOH.
iv) State one relevant observation for each of the following: [3]
a) To the copper nitrate solution, initially few drops of sodium hydroxide solution is added in excess.
b) Burning of ammonia in excess of oxygen.
c) Dry Ammonia gas is passed over heated PbO.
Question 7
i) Name the following: [2]
a) Organic compounds with same molecular formula but different structural formula.
b) Group of organic compounds where the 'successive members' follow a regular structural pattern, successive compounds differ by a 'CH₂(g) 'group.
ii) Give reason for the following. [2]
a) ionization potential decreases down a group.
b) Ionic compounds do not conduct electricity in solid state.
iii) Calculate : [3]
a) The percentage of phosphorus in the fertilizer super phosphate Ca(H₂PO₄)₂ correct to 1 decimal point (At. wt. H=1, P= 31, O= 16, Ca= 40)
b) Write the empirical formula of C₈H₁₈.
iv) Answer the following questions with reference to electrorefining of copper: [3]
a) What is the anode made of ?
b) What do you observed at the cathode ?
c) Write the reaction taking place at the cathode.
Question 8
i) Arrange the following according to the instruction given as brackets: [2]
a) C₂H₂, C₃H₆, CH₄, C₂H₄ (in the increasing order of the molecular weight)
b) Cu²⁺ , Na⁺, Zn²⁺, Ag⁺ (The order of Preferential discharge at the cathode)
ii) Differentiate between the following pairs based on the criteria given the brackets. [2]
a) Cane sugar and hydrated copper sulphate (using concentrated H₂SO₄.
b) Sulphuric acid hydrochloric acid (types of salts formed)
iii) Convert the following reactions into a balanced chemical equation: m[3]
a) Ammonia to nitric oxide using oxygen and platinum catalyst.
b) Sodium hydroxide to sodium sulphate using sulphuric acid.
c) Ferrous sulphide to hydrogen sulphide using hydrochloric acid.
iv) Choose the answer from the list which fits in the description: [3]
(CCl₄ , PbO, NaCl, CuO, NH₄Cl)
a) A compound which undergoes thermal dissociation.
b) An amphoteric oxide.
c) A compound which is a non electrolyte.
20/8/24
Maximum Marks: 80
Time allowed: 2 hours
Answer to this paper must be written on the paper provided separately.
You will not be allowed to write during the first 15 minutes .
This time is to be spent in reading the question paper.
The time given at the head of this Paper is the time allowed for writing the answers.
______________________________
Section A is compulsory. Attempt any four questions from section B.
The intended marks for questions or parts of questions are given in brackets [. ]
____________________________
SECTION - A(40 Marks)
(Attempt all questions from this section).
Question 1
Select the correct answers to the questions from the given options.
(Do not copy the question, write the correct answer only). [15]
i) The sex chromosome in a human ovum is:
a) X chromosomes
b) Y chromosome
c) Both X and Y chromosomes
d) either X or Y chromosome
ii) Which one of the following is a biodegradable waste ?
a) metal cans b) E- waste c) plastic d) flowers
iii) The heart sound 'Dup' is produced when :
a) semilunar valves open
b) Atrio ventricular valve close
c) semilunar velves close
d) Atrio ventricular valves open.
iv) Deplasmolysis occurs when a plasmolysed cell is placed in:
a) Concentrated salt solution b) tap water
c) concentrated sugar solution
d) hypertonic salt solution
v) Alpha cells of pancreas secrete:
a) glycogen b) Glucose c) Glucagon d) insulin
vi) haploid number of chromosomes are found in:
a) nephrons b) neurones c) skin cells d) Sperms
vii) The life span of an RBC is:
a) 120 days b) 220 days c) 20 days d) 2 weeks
viii) The statistical study of human population is called:
a) Mortality b) demography c) natality d) Equality
ix) The pale yellow colour of normal human urine is due to pigment:
a) melanin b) Anthocyanin c) Urochrome d) hemoglobin
x) Stimulation of nerves of the sympathetic nervous system:
a) Accelerates heartbeats
b) Constricts pupil eyes
c) increase peristalsis
d) Retards heartbeat
xi) The site of the light reaction in the cells of a green leaf is:
a) nucleus b) Grana of chloroplast c) Cytopy d) Stroma of chloroplast
xii) The paper used to demonstrate unequal transpiration in a dicot leaf is:
a) filter paper b) litmus Paper c) starch paper d) Cobalt chloride paper
xiii) Vitreous humour is present between:
a) cornea and Iris b) lens and retina c) Iris and lens d) cornea and lens
xiv) Oxygen blood to liver is supplied by :
a) hepatic artery b) hepatic vein c) inferior venacava d) hepatic portal vein
xv) During the synthesis phase of the cell cycle, more of :
a) RNA is stnthesized
b) RNA and s are synthesized
c) DNA is synthesized
d) Glucose is syntr
Question 2
i) Name the following: [5]
a) The organelle that forms the aster during cell division
b) A genetic disorder in which the blood does not clot.
c) The permanent stoppage of mensuration in human females around the age of 45 years.
d) A gaseous plant hormone which promotes ripening of fruits.
ii) Arrange and rewrite the terms in each group in correct order to be in a logical sequence begenning with the term that is covered: [5]
a) Snake, Rabbit, (Cabbage), Hawk.
b) Xylem, (Soil water), Cortical cells, Root hair
c) (Receptor), Response, Effector, Spinal Cord.
d) Fovea, Lens, cornea, (Conjunctiva)
e) (Testis), Urethra, Sperm duct, Epididymis.
iii) Match the Column [5]
Column A
a) Hyposecretion of Thyroxine in adults
b) Hyposecretion of Insulin
c) Hyposecretion of Growth hormone in childhood
d) Hyposecretion of ADH
e) Hyposecretion of Thyroxine
Column B
1. Diabetes insipidus
2. Myxedema
3. Dwarfism
4. Gignatisi
5. Diabetes mellitus
6. Exophthalmic goitre
7. Cretinism
iv) Choose the odd one out from the following terms and name the category to which the other belong: [5]
a) Used bandages, pesticides, face masks , Syringes
b) Dust, smoke, carbon monoxide, Effluents
c) Uterus, Urethra, Urinary bladder, Ureter
d) Menstrual phase, Telophase, Follicular phase, Luteal phase.
e) Malleus, Incus, Cochlo, Stapes.
v) State the exact location of the following structures:
a) thyroid gland
b) dura mater
c) Amniotic fluid
d) papillary muscles.
e) Islet of Langerhans
Section B(40 marks)
(Attempt any four questions from this Section)
Question 3
i) Write the overall chemical equation for photosynthesis. [1]
ii) Mention any tow functions of blood. [2]
iii) Differentiate between Karyokinesis and Cytokinesis. [2]
iv) Excessive use of fertilizers in agricultural fields reduces the yield of crops. Justify the statement. [2]
v) Study the diagram given below and answer the questions that follow:
a) Name the phenomenon by the shoot in the above diagram.
b) Which plant hormone plays an important role in the above movement ?
c) Complete and rewrite the given statement by filling in the correct terms
Shoot show____ whereas, roots show _____.
Question 4
i) Expand the abbreviation --DNA. [1]
ii) What is active transport ? [2]
iii) Mention the two points of a nitrogenous bases which pair with each other with hydrogen bonds. [2]
iv) State MendrLaw of Segregation. [2]
v) Draw a neat, labelled diagram of a human sperm. [3]
Question 5
i) Explain the term 'Population density'. [1]
ii) Name the two surgical methods of population control. [2]
iii) Mention two factors responsible for the population explosion in India. [2]
iv) Name any two resources which come under pressure due to rising population. [2]
v) The diagram given depicts the climate change on planet Earth. [3]
Answer the following question:
a) Name the climatic phenomena for the increase in Earth's temperature.
b) Mention one reason for this warming.
c) What measure can be taken to prevent this climate change ?
Question 6
i) Define the term Transpiration. [1]
ii) State any two adaptations in plants to produce transpiration. [2]
iii) Mention any two function of the human foetal placenta. [2]
iv) What is the significance of the human testis being located in scrotal sacs outside the abdomen? [2]
v) Draw a neat, labelled diagram of a Malpighian Capsule. [3]
Question 7
i) What is a Reflex action ? [1]
ii) Renal cortex has a dotted appearance and Renal medulla has a stripped appearance. Explain ? [2]
iii) What are the two function of cerebellum? [2]
iv) Distinguish between semicircular and Utriculus based on their function. [2]
v) A potted plant with variegated leaves was kept in the dark for 24 hours and then placed in bright sunlight. Answer the following questions.
a) Which aspect of photosynthesis is being tested in the above diagram.
b) Why was the plant kept in dark for 24 hours.
c) After the starch test what will be the colour of the yellow and green parts of the leaf ? Give reasons to support your answer.
Question 8
i) Define the term Mutation. [1]
ii) A pure breeding red flower variety of pea plant(RR) is crossed with a pure breeding white flower variety of pea plant(rr). Draw a Punnett square to find out the Phenotype and Genotype ratios of the progeny belonging to the F₂ generation. [2]
iii) Leaves of certain planrt roll up on a hot Sunny day. Explain by giving suitable reasons.
iv) What is a semipermeable membrane ? Name the semi permeay membrane present in a plant cell. [2]
v) The diagram below depis the human heart in one of its phar. Answer the questions that follow: [3]
a) which part of the heart is in the contraction phase?
b) Give a suitable reason to justify your answer.
c) Distinguish between Systole and Diastole.
5/8/24
1) New cells are to be produce for all the following process except
a) movement b) growth c) reproduction c) germination
2) The chromosomes are the duplicated in
a) G₁ phase b) S phase c) G₂ phase d) M phase
3) The correct sequence in the mitosis are
a) prophase, metaphase, anaphase and telophase
b) prophase anaphase , metaphase and telophase
c) metaphase , anaphase prophase and telophase
d) telophase, anaphase, prophase and metaphase
4) Which of the following are called equational division ?
a) mitosis and meiosis I
b) mitosis and meiosis II
c) mitosis and meiosis
d) meiosis I only
5) The correct sequence of phases in interphase is
a) G₁, S and G₂
b) S, G₂ and G₁,
c) G₂, S and G₁
d) G₁, G₂ and S
6) Name the phase which comes after mitotic phase.
a) G₁ phase b) S phase c) G₂ phase d) M phase
7) S phase represents
a) synthesis b) gaps c) division d) resting
8) A cell has 12 chromosomes. After mitotic division the daughter cell will have
a) 24 chromosomes b) 6 chromosomes c) 18 chromosomes d) 12 chromosomes
9) The points where two non-sister chromatids crossover are called
a) chromatid b) centromere c) chiasmata d) kinetochore
10) The shortest phase of mitosis is
a) anaphu b) metaphase c) telophase d) prophase
11) The details structure of DNA was given by
a) Waldeyer b) Balbiani c) Watson and Crick d) Mendel
12) Two hydrogen bonds are present between
a) Guanine and cytosine b) Adenine and thymine c) Adenine and Guanine d) Thymine and cytosine
13) 23rd pair of chromosomes is called
a) autosomes b) chromosomes c) heterosomes d) nullisomes
14) The lifespan of the sperm cells is
a) 2-3 days b) 120 days c) 25-30 days d) 2-3 weeks
15) DNA replication occurs during
a) M phase b) G₁ phase c) G₂ phase d) S phase
16) which of the following organelle has the role to initiate and regulate cell division in animal cells ?
a) SER b) centrosome Golgi bodies d) lysosomes
17) In which of the following parts of the chromosomes , DNA does not exist in the form of nucleosomes ?
a) Euchromatin b) Kinetochore c) Hetrochromatin d) Satellite DNA
18) The given diagram is of a purine base. What are the examples of purine bases from the following ?
a) Adenine and Cytosine
b) Adenine and Guanine
c) Cytosine and Thymine
d) Cytosine and Uracil
19) Pentose sugar and nitrogenous base together form
a) Nucleotide b) Nucleoside c) DNA d) gene
20) The point where two sister chromatids of a chromosomes are attached is known as
a) chismao b) chromatids c) chromomere d) centromere
21) Which of the following is reduction division ?
a) meiosis I b) meiosis II c) mitosis d) interphase
22) The chromatin material is formed of
a) DNA only b) DNA and histone c) Nucleotides d) histone only.
23) What are those structures that appear as the beads on a string in the chromosome called ?
a) Genes b) nucleotides c) nucleosomes d) nitrogenous bases
24) Chromosoms are formed of
a) nucleoprotein fibre
b) polynucleotide chain
c) Prochromosomes
d) histones in RNA
25) Which one of the following is not a correct statement about chromosomes ?
a) chromosomes appear only during cell division
b) chromosomes are passed on to the daughter cella during cell division
c) Duplication of chromosomes takes place during metaphase.
d) Chromosomal duplication is preceded by DNA replication.
26) The two polynucleotides strands of DNA are
a) complementary and parallel
b) complementary antiparallel
c) supplementary and parallel
d) supplementary and antiparallel
2/8/24
Time: 30 minutes Marks: 20
Section 1
(All questions are compulsory)
1)a) Define moment of force and state its SI unit. (2)
b) Screw jack is provided with a longer arm. Why? (2)
c) State the principle of moments as applied to a beam in equilibrium . (2)
d) Differentiate between centripetal force and centripetal force. (2)
e) A nut is opened by a spanner of length 10cn. If the least force required is 10N.
Find the moment of force required to turn the nut. (2)
Section 2
(Attempt any one question out of two)
2a) The figure shows two forces F₁ = 5N and F₂= 3N acting at points A and B of a rod pivoted at a point O such that OA= 2m and OB= 4m.
Calculate
i) The moment of force F₁ about point O
ii) The moment of force F₂ about point O
iii) The total moment of two forces about O. (3)
b) Define the term Couple. State its mathematical relation and also stated its SI unit. (3)
c) State the position of centre of gravity for the following objects:
i) scalene triangle
ii) Hollow ring
iii) solid cone
iv) solid cylinder (4)
3a) A uniform metre scale is balanced at 60 cm mark such that two weight one of 5 gf and another 40gf are suspended 10cm mark and 80cm mark respectively. Calculate the weight of the metre scale. (3)
b) A stone of mass m kg is rotated in a circular path with uniform speed by tying a strong string with the help of your hand. Answer the following questions :
i) is the stone moving with uniform or variable speed ?
ii) is the stone moving with uniform acceleration?
iii) in which direction does the acceleration act?
iv) What kind of force acts on the hand? State its direction. (4)
c) A boy of mass 30kg is sitting at a distance of 2m from the middle of the see-saw.
Where should a boy of mass 40 kg sit so as to balance the see-saw? 3
Day - 10 (7/5/24)
1) Name the Pair of genes responsible for a particular characteristic in an individual
2) Given below is an apparatus used to study a particular process in plants. Study the same and answer the questions that follow:
b) Mention one limitation of this appartures.
c) Which phenomenon is studied with the help of this appartus?
d) What is the function of the part marked 'reservoir'?
e) What is the role of the air bubble in the experiment ?
3) Name the organ or structure that transmits characteristics from parent to offspring.
4) Transports water from the soil to other parts of the plant.
5) Define guttation.
6) Define Osmosis:
7) Arrange the words in logical sequence, representing a process or a function.
Soil water --> root hair--> cells of cortex---> epidermis --> Xylem.
8) Differentiate between Pure and Hybrid strains (Definition).
9) a) State Mendel's law of independent Assortment.
b) A homozygous Tall plants(T) bearing red coloured(R) flowers is crossed with a homozygous Dwarf plant(t) bearing white flowers(r).
i) Give the Genotype and Phenotype of the F₁ generation.
ii) Give the possible combinations of the gametes that can be obtained from the F₁ hybrid.
iii) Give the dihybrid ratio and the phenotype of the offspring of the F₂ generation when two plants of F₁ generation above are crossed.
Day- 9
1) a) The element at the bottom of a group is expected to show ____metallic characters than the element at the top of a group. ( less or more)
b) The similarities in the properties of elements in a group is because they have the same_____(electronic configuration/ number of outer electrons).
c) The properties of elements are periodic function of their ____. (mass number/ atomic numbers)
d) Moving across a ____of the periodic table, the elements show increasing ____character. (group/period/ metallic/ nonmetalic)
2) Name the gas produce when chlorine water is exposed to direct sunlight.
3) Write fully balance chemical equation for ammonia gas and hydroxen chloride gas.
4) Two compounds whose aqueous solutions give white precipitate with dilute hydrochloric acid.
5) Write fully balanced chemical equations for concentric hydrochloric acid is boiled with the manganese dioxide.
Day - 8(Biology)
1) Name : A pair of genes responsible for particular characteristics in an individual.
2) Name the organs or structure that transmit characteristics from parent to offspring.
3) Define Mutation
4) Differentiate between Pure and Hybrid strains (definition).
5) Expand: DNA
6) a) State Mendel's law of independent Assortment.
b) A homozygous Tall plant(T) bearing red coloured(R) flowers is crossed with a homozygous Dwarf plant(t) bearing white flowers (r).
i) Give the Genotype and Phenotype of the F₁ generation.
ii) Give the possible combinations of the gametes that can be obtained from the F₁ hybrid.
iii) Give the dehybrid ratio and the phenotype of the offsprings of the F₂ generation when two plants of the F₁ generation above are crossed.
Day - 7(Chemistry)
HYDROCHLORIC ACID
1) Identify the following :
a) Name of experiment which shows that hydrogen chloride gas is extremely soluble in water.
b) A gas liberated when dilute hydrochloric acid is treated with magnesium.
c) A coloured gas which reacts with hydrogen gas to form hydrogen chloride gas.
d) A gas liberated when calcium hydrogen carbonate is treated with dilute hydrochloric acid.
e) A white percipitate formed when sodium chloride solution is treated with silver nitrate solution.
f) A concentrated acid (1 part) which forms aqua regia, when mixed with three parts of conc. Hydrochloric acid.
g) An element liberated when sodium thiosulphate solution reacts with dilute hydrochloric acid.
h) A salt of sodium on treating with dilute hydrochloric acid liberates Sulphur dioxide gas.
i) A nitrate of a metal (other than silvery nitrate), which forms while precipitate when treated with dilute hydrochloric acid.
j) Name the gas evolved when potassium sulphide is treated with dilute hydrochloric acid.
k) Name the gas evolved when hydrochloric acid is made to react with manganese dioxide.
l) Name an acid which on mixing with silver nitrate solution produces a white percipetate which is soluble excess of ammonium hydroxide .
m) Name the gas that is produced by the action of dilute hydrochloric acid on sodium sulphide.
2) Complete the following by choosing the correct answers from the bracket.
a) The common name for hydrochloric acid is ______.(Muriatic acid/Aqua Fortis)
b) The traces of hydrochloric acid are present in ____.(pancreatic juice/ gastric juice)
c) Hydrogen gas and chlorine gas react____ when exposed to direct sunlight.(slowly/ explosively)
d) All metallic chlorides on heating with concentric____liberate hydrogen chloride gas.( nitric acid/sulphuric acid)
e) In laboratory hydrogen chloride gas is prepared by heating_____with conc. Sulphuric acid.(calcium chloride/sodium chloride)
f) During the preparation of hydrogen chloride from common salt and concentric Sulphuric acid, the salt formed is sodium hydrogen sulphate, if the reaction mixture is kept _____200°C (above/below)
g) Hydrogen chloride is collected by the upward displacement of air because its vapour density is____ as compared to air being 14.4. (36.5/18.5)
h) 1 volume up water at room temperature absorbs____ volumes of hydrogen chloride gas. (700/450)
i) Hydrogen chloride gas is dried by passing it through____. (Phosphorus pentoxide/conc. Sulphuric acid)
j) An alkaline solution which gives dense white fumes with hydrochloric acid gas is ____. (Sodium hydroxide/ammonium hydroxide)
k) Quicklime is not used to dry HCL because _____. (CaO is alkaline/ CaO is acidic/ CaO is a neutral)
l) potassium sulphite on reacting hydrochloric acid releases ____gas.(Cl₂/SO₂/ H₂S)
m) dry hydrogen chloride gas can be collected by _____displacement of air.(downward/ upward) is_____. (sodium hydrogen sulphate/sodium sulphate/chlorine)
n) The acid which cannot act as an oxidizing agent is _____.(Conc. H₂SO₄/conc. HNO₃/conc HCL)
3) Give balanced chemical equation for the following:
a) sodium thiosulphate and dilute HCl.
b) Calcium hydrogen carbonate and dilute HCl.
c) Concentrated hydrochloric acid and potassium permanganate crystals.
d) Action of dilute hydrochloric acid on sodium sulphide.
e) Action of hydrochloric acid on sodium bicarbonate .
f) Action of dilute hydrochloric acid and magnesium sulphite.
g) Action of dilute hydrochloric acid on iron.
Day - 6(Chemistry)
Hydrochloric Acid
1) The gastric juice secreted by the walls of the stomach contains:
a) sulphuric acid b) hydrochloric acid c) nitric acid d) acetic acid
2) When the equal volumes of hydrogen gas and chlorine gas are exposed to diffuse sunlight, the reaction:
a) does not takes place b) takes place at at moderate speed c) is explosive in nature d) none
3) In the preparation of hydrogen chloride gas from common salt the acid used is:
a) dilute sulphuric acid b) glacial Acetic acid c) conc. sulphuric acid d) carbonic acid
4) In the preparation of hydrogen chloride gas in laboratory, the reaction mixture should be:
a) kept below 10°C b) kept below 200°C c) kept above 200°C d) any of these
5) The drying agent used in the laboratory the preparation of dry HCL gas is:
a) Phosphorus pentoxide b) anhydrous calcium sulphate c) calcium oxide d) conc. sulphuric acid
6) The salt formed when sodium chloride and conc. Sulphuric acid are heated below 200°C is :
a) sodium hydrogen sulphate b) sodium sulphate c) sodium bisulphate d) either a or c
7) In order to find that a given jar is filled with HCl gas, a glass rod dipped in ____ solution is held near its mouth.
a) ammonia b) caustic soda c) caustic potash d) barium chloride
8) Hydrogen chloride gas is collected :
a) by the upward displacement of air b) downward displacement of air c) downward displacement of water d) over the mercury
9) HCL gas extremely soluble in water. One volume up water at 20°C can absorb:
a) 200 volumes of HCL b) 450 volumes of HCL c) 150 volumes of HCL d) 800 volumes of HCL
10) HCl gas turns alkaline phenolphthalein solution from:
a) pink to green b) pink to blue c) pink to colourless d) pink to yellow
11) The advantage of using inverted funnel for the absorption of HCl gas in water is:
a) it prevents back suction into the reaction mixture
b) it provides large surface area of water for absorption
c) it prevents explosion in apparatus d) both a and b
12) A non metallic hydroxide, which forms dense white fumes with HCl gas is compound of:
a) nitrogen and hydrogen b) nitrogen and oxygen c) nitrogen and carbon d) nitrogen and sulphur
13) A metallic carbonates react with dilute hydrochloric acid to form theit respective :
a) chlorides and water b) chloride and carbon dioxide gas c) chlorides, water and carbon dioxide gas d) none
14) When dilute HCl is mixed with clear solution of silver nitrate, a precipitate is formed which is:
a) yellow in colour b) silvery in colour c) curdy white in colour d) blue in colour
15) Aqua region is a mixture of:
a) 3 parts of conc. HCL and 1 part of conc. HNO₃
b) 1 part of conc. HCL and 3 parts of conc.HNO₃
c) equal parts of conc. HCL and conc. HNO₃ d) none
16)) Black copper(II ) oxide is placed in a beaker containing hydrochloric acid. After 1 hour the colour of reaction mixture changes to:
a) grey b) brown c) red d) blue
17) A chemical/chemicals which can dissolve gold is:
a)! Aqua Fortis b) aqua regia c) aqua pure d) none
18) An acid commonly applied on the surface of metal before soldering or welding is:
a) conc. sulphuric acid b) conc. nitric acidic c) conc. acetic acid d) conc. hydrochloric acid
19) The common name of hydrochloric acid is :
a) Marine acid b) muriatic acid c) solution of HCl d) none
20) Traces of hydrochloric acid is present in:
a) pancreatic juice b) gastric juice c) bile secreted by liver d) none
21) When equal volume of a mixture of hydrogen and chlorine are exposed to direct sunlight, they:
a) do not react b) react at a moderate speed c) react violently d) none
22) The acid with reacts with metallic chlorides, either without heating or with heating is:
a) conc. Nitric acid b) glacial acetic acid c) dilute sulphuric acid d) conc. Sulphuric acid
23) conc. dilute sulphuric acid react with the Iron (II) chloride on heating to form:
a) iron(II ) sulphate and HCL only b) iron(II ) sulphate, water and HCL only c) iron(III ) sulphate and HCL gas only d) iron(III ) sulphate, water and HCL gas only
24) concentrated or dilute sulphuric acid does not react with lead chloride, because:
a) lead is lower than hydrogen in electrochemical series
b) lead is higher than the hydrogen in electrochemical series
c)!an insoluble thin layer of lead sulphate is found over lead chloride , which cuts off chemical reaction d) none
25) In laboratory , hydrogen chloride gas is prepared by heating conc. H₂SO₄ with:
a) potassium chloride b) magnesium chloride c) sodium chloride d) ammonium chloride
26) Sodium chloride is used in the preparation of hydrogen chloride gas because:
a) it is cheapest chemical b) it is readily available c) it reacts readily with conc. H₂SO₄ even without heating d) all of these
27) The sodium chloride and conc. Sulphuric acid mixture should not be heated beyond 200°C, because:
a)! sodium sulphate so formed fuses with glass apparatus and makes it useless
b) rate of evolution of HCl gas is very high and hence it is difficult to collect
c) the apparatus may crack because sodium sulphate acts as a bad conductor of heat
d) all of these
28) During the laboratory preparation of hydrogen chloride gas from common salt and conc. H₂SO₄, the salt formed is sodium hydrogen sulphate, only when the temperature of mixture is:
a) 300°C b) 250°C c) 220°C d) below 200°C
29) Hydrogen chloride gas is heavier than air because its vapour density is:
a) 17.75 b) 18.25 c) 36.5 d) 22
30) 1 volume of water at room temperature will absorb :
a) 750 c.c of HCl gas b) 200 c.c of HCl gas c) 450 c.c of HCl gas d) 650 c.c of HCl gas
31) Hydrogen chloride gas is dried by bubbling it through conc.H₂SO₄ because:
a) HCl gas does not react chemically with conc.H₂SO₄
b) conc. H₂SO₄ being dehydrating agent absorbs moisture present in the HCL gas
c) conc.H₂SO₄ is least volatile acid and hence it's vapours do not mix with HCl gas.
d) all of these
32) An Alkaline solution which gives dense white fumes with HCl gas is :
a) sodium hydroxide b) potassium hydroxide solution c) ammonium hydroxide solution d) calcium hydroxide solution
33) When silver nitrate solution is treated with hydrochloric acid a thick curdy white precipitate of silver chloride is formed. This white precipitate dissolves in excess of:
a) sodium hydroxide solution b) ammonium hydroxide solution c) potassium hydroxide solution d) calcium hydroxide solution
34) When hydrochloric acid is added in lead nitrate solution, then a precipitate of lead chloride is formed which is :
a) white in colour b) light yellow in colour c) reddish brown in colour d) deep yellow in colour
35) The precipitate lead chloride in question 34 (above) along with rest of the reaction mixture is boiled. It is seen
a) percipetate changes to orange colour
b) no changes takes in precipitate
c) precipitate redissolves and a colourless liquid is formed d) none
36) The solution of nitrate/s of a metal/s which form white precipitate with dil. HCl are:
a) Zn(NO₃)₂ sol. b) Pb(NO₃)₂ sol. c) AgNO₃ d) both b and c
37) A salt of sodium which on boiling with conc. HCl gives reddish brown fumes of nitrogen gas is :
a) Na₂S b) NaHCO₃ c) Na₂SO₄ d) NaNO₃
38) When calcium hydrogen carbonate is treated with dilute HCl , the products formed are:
a) calcium chloride and water
b) calcium chloride and carbon dioxide
c) calcium chloride, water and CO₂ gas
d) calcium chloride, water and carbon monoxide gas
39) Which is not a correct statement?
When Na₂CO₃ is treated with dilute hydrochloric acid ?
a) a lot of effervescence takes place
b) carbon dioxide gas evolved
c) carbon dioxide and carbon monoxide gas evolved
d) both a and b
40) Iron savings reacts with dilute hydrochloric acid to form:
a) iron(II) chloride and water b) iron(II ) chloride and hydrogen c) Iron(III ) chloride and hydrogen d) Iron (III) chloride and water
41) In a beaker containing dilute HCl is poured 2g of black copper oxide(II ). The beaker is left undisturbed for one hour. After this time interval the colour of reaction mixture is:
a) colourless b) light green c) blue d) yellow
42) The products formed when magnesium sulphide is treated with dil. HCl are:
a) magnesium chloride and hydrogen gas
b) magnesium chloride and sulphur
c) magnesium chloride and hydrogen sulphide gas d) none
43) The product formed when potassium hydroxide sulphide (KHS) is treated with dilute HCl are:
a) KCL and sulphur b) KCL, water and sulphur c) KCL, H₂S and water d) KCL and H₂S gas only
44) The products formed when potassium hydrogen sulphite[KHSO₃] is treated with dilute HCl are:
A) KCL and sulphur b) KCL, water and sulphur c) KCL, SO₂ gas and water d) KCL, H₂S gas and water
45) The products formed when zinc sulphite is treated with HCl are:
a) zinc chloride and SO₂ gas b) zinc chloride and SO₃ gas c) zinc chloride, SO₂ gas and sulphur d) zinc chloride, SO₂ gas and water
46) The products formed when sodium thiosulphate solution is mixed with dilute hydrochloric acid are:
a) sodium chloride, water and SO₂ gas
b) sodium chloride, water and sulphur
c) sodium chloride, water, SO₂ gas and sulphur
d) sodium chloride, SO₂ gas and sulphur
47) When copper nitrate crystals are boiled with conc. HCl, the products formed are:
a) copper(II ) chloride and water
b) copper(I ) chloride and nitric acid
c) copper(II ) chloride and nitric acid
d) copper (II) chloride, water and nitric acid
48) When MnO₂ boiled with conc. HCl, the products formed are:
a) manganese chloride and water
b) manganese chloride and chlorine
c) manganese chloride, water, chlorine d) none
49) When lead dioxide is boiled with conc.HCl, the product formed are:
a) lead (II) chloride and water
b) lead(IV ) chloride and chlorine
c) lead(II ) chloride and chlorine
d) lead+II ) chloride, water and chlorine
50) When red lead oxide [Pb₃O₄] is boiled with conc. HCl, the products formed are:
a) lead(II ) chloride and chlorine b) lead(IV ) chloride and chlorine c) lead (II) chloride and water d) lead(II) chloride, water and chlorine
51) When potassium permanganate [KMnO₄] is treated conc. HCL, the product of reaction are:
a) potassium chloride, manganese chloride and water
b) potassium chloride, manganese chloride and chlorine gas
c) potassium chloride, manganese chloride, water and chlorine gas
d) none of these
52) When potassium dichromate(K₂Cr₂O₇) is boiled with conc.HCl, the products of reaction are:
a) potassium chloride, chromium chloride and water
b) potassium chloride, chromium chloride and chlorine gas
c) potassium chloride, chromium chloride, water and chlorine gas
d) none of these
53) Which is not a correct statement ?
Hydrochloric acid is used in:
a) the manufacture of dyes, drugs and paints
b) soldering and welding of metal
c) food preservative industry
d) leather industry
54) The aim of fountain experiment is to prove:
a) HCL turns blue litmus red
b) HCl is denser than air
c) HCl is highly soluble in water
d) HCL fumes in moist air
Day- 5 (Physics)
1) Work is measured as a product of_
__ and ____.
2) One joule work is said to be done when a force of ___displaces a body by____.
3) The SI unit of work is____.
4) If the force and displacement are parallel to each other, the work done is ___ and ____.
5) In a circular path, the work done by a body is____(zero/ not zero).
6) State true or false also correct the false statement.
if the displacement is normal to the direction of the force , the work done is negative.
7) What are the conditions under which no work is done by a force acting on a body ?
8) Is work a scalar or vector quantity ?
9) In which case the work done by a force will be maximum :
10) State a angle of a situation where the work done by a force is negative ?
11) Give an example when a work done by a force acting on a body is zero even though the body gets displaced from its initial position by the application of force.
12) For maximum work what should be the angle between force and the displacement ?
13) What is the SI unit of work ?
14) How much is the work done by a body when it moves over a complete circular path ? Give reason for your answer.
15) What should the angle between force and displacement be to get the :
a) minimum work ?
b) maximum work ?
16) In which of the following cases, is the work being done?
i) a man pushing a wall ii) A coolie standing with a load of 12kg on his head iii) A boy climbing a staircase iv) a boy carrying a box on his head and moving on a frictionless horizontal surface .
17) The sign of the work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative :
a) work done by a man in lifting a bucket out of a well by means of rope tied to the bucket.
b) Work done by gravitational force in the above case.
c) work done by friction on a body sliding down an inclined plane.
d) work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.
e) work done by the resistive force of air on a vibrating pendulum in bringing it to rest.
18) Write an expression for the work done by a constant force acting on a body which gets displaced from its initial position in a direction different from the direction of the force.
19) Give an example when work done by a force acting on a body is zero even though the body gets displaced from its initial position by the application of force.
20) Define work.
21) How is work done related to the applied force ?
22) From the ground floor, a man comes up to the fourth floor of a building using the staircase. Another person comes up to the same floor using an elevator. Neglecting friction, compare the work done in the two cases.
23) Under what condition the work done by a force is:
a) zero?
b) maximum and positive ?
c) negative ?
24) How is the work done by a force measured ?
25) Choose the correct option:
a) when work is done on a body.
i) it gains energy ii) it loses energy iii) its energy remains constant d) none
b) A man pushes a wall fails to displace it. He does :
i) negative work ii) positive work iii) no work at all iv) maximum positive work
c) The work done by a force on a body will be positive if the:
u) body does not move
ii) body moves perpendicular to the direction of the applied force .
iii) body moves along the direction of the applied force
iv) body moves opposite to the direction of the applied force.
Day- 4 (Biology)
1) The diagram given alongside represents a kidney cut open longitudinally. Study the same and then answer the questions that follow:
a) Name the structural and functional unit of the kidney.
b) what is the region labelled '1' called ? What part of the above mention structure is found in this region?
c) Name the part labelled '4'. What is its function ?
d) Name two nitrogenous substances that are excreted by the kidney.
3) Brain related to neuron: Kidney related to ______
4) The figure alongside is that of a nephron.
a) Label the part 1 to 8.
b) What is the liquid entering part '4' called ? Name two substances present in it that are reabsorbed in '6'.
c) Name two substances present in the part labelled '1' which are not present in the part labelled '8'. (5)
5) The structure in the kidney where ultra filtration takes place.
6) The duct which transports urine from the kidney to the urinary bladder.
Day -3 (Chemistry)
1) What is the position of zero group in long form of periodic table ? (1)
2) Which of the elements in the pairs given below will have smaller atomic size ? (2)
a) sodium or magnesium.
b) nitrogen or Phosphorus.
3) With reference to 2nd period of a Periodic Table, name an element: (2)
a) which has largest atomic volume ?
b) which has smallest atomic volume ?
4) Atomic number of an element is 18. 2,8,8. (2)
a) State the group number to which this elements belongs.
b) State the period of the element.
5) An element M has atomic number 19. Answer the following question: (3)
a) is the element a metal or a nonmetal ?
b) is the element more reactive than calcium or less ?
c) write the formula of sulphate of the element.
6) The sentences given below are taken from the long form of Periodic Table. Fill in the blank spaces with appropriate words from the list of words given below: (8)
list of words: Lanthanides, separated, transition, normal, 18, zero , metallic, nonmetallic.
a) The subgroups A and B are ____in this table.
b) The _____elements are accommodated in the middle of table.
c) There are _____vertical columns for long period.
d) The strongly _____elements occupy group IA and II A respectively on the left of transition elements.
e) The _____elements are placed on right hand side of the transition elements.
f) The rare gases are placed in____ group at the end.
g) The elements occupying left and right wing groups of periodic table are called _____ elements.
h) The actinides and____ are kept outside the periodic table to mark their peculiar properties.
7) Given below is the part of the periodic table :
Li Be B C N O F
Na Mg Al Si P S Cl
a) How does metallic character of an element change as one moves from:
i) left to right in a period ?
ii) top to bottom in a group ?
b) How does the valency of elements changes with respect to hydrogen as one moves from left to right in a period ?
c)i) What is the valency of element Si?
ii) will it form a covalent or electrovalent bond with hydrogen ?
d) which is the:
i) most metallic element in the above table ?
ii) most non metallic element in the bob table ?
e) By drawing a dot diagram show the reaction between the elements named in (i) and (ii). (8)
8) Atoms of two elements P and Q have electron configuration (2,8, 18,2) and (2,8,7) respectively. Answer the following questions. (3)
a) To which periods of the periodic table do P and Q belong ?
b) to which group of the periodic table do P and Q belong?
c) amongst P and Q, which forms polarvalent compound with hydrogen ?
9)a) Give the number of elements in (1) 1st period (2) 2nd period (3) 3rd period of periodic table.
b) Name the elements in first period.
c) what happens to atomic size of the elements when one moves from left to right in periodic table. (3)
10) a) State common feature of elements at the end of second and third periods with respect to electronic configuration.
b) State whether the elements in group 7A are metallic or non metallic in characters.
c) If an element has one electron in its valence shell (outermost shell), then it is likely to be_____( metallic non metallic). (3)
Day 2 (Chemistry)
1) The element at the bottom of a group is expected to show_____metallic character than the element at the top of a group (less, more).
2) The similarities in the properties of elements in a group is because they have the same ____(electronic configuration, n
umber of outer electrons).
3) The properties of elements are periodic function of their____.( mass numbers ,atomic numbers).
4) Moving across a ____of the periodic table, the elements show increasing____ character.( group, period, metallic, nonmetallic)
5) Arrange the metals in the increasing order of reactivity sodium, magnesium, zinc, iron and copper.
6) Define:
a) Ionization potential or ionization energy.
b) electronegativity
7) How does ionization potential vary across the period represented by the elements from sodium to argon?
8) What changes occurs in electronegativity while going down the group of alkali metals from lithium to caesium ?
9) Describe the change in metallic characters associated when moving:
a) across the period from left to right.
b) down a group from top to bottom .
10) During the 19th century many claims were made regarding the discovery of new elements. In the end there were more elements than the spaces available in periodic table. What unique feature of each element determines its position in the periodic table and assures us that no new element remains to be discovered ?
11) What feature of atomic structure accounts for the similarities in the properties of the halogen.
12) who proposed the original periodic table ?
13) Write down the word which will correctly complete the following sentence:
The relative mass of a light element up to calcium is approximately____its atomic number.
14) How many periods are in Mendeleev's periodic table ?
15) How many groups are in Mendeleev's periodic table ?
16) How many groups consist of normal elements and transition elements in Mendeleev's periodic table.
17) Why were some gaps left in Mendeleev's periodic table ?
18) Carbon(At.no.6) and nitrogen(At.no.7) belong to same period of periodic table. Write down the
a) Electronic configuration of carbon and the group to which it belongs.
b) electronic configuration of nitrogen and the group to which it belongs.
c) Name one more element which is in the same group as nitrogen.
19) I II III IV V VI VII ZERO
Lithium. carbon oxygen L neon
X E G Q
Y R
Z T
In the periodic table given above, lithium, carbon, Oxygen and neon are placed in their correct positions . The position of nine other elements is represent by letters. These letters are not the symbols of elements concerned. Answer the following questions.
a) Write the letter for most reactive metal.
b) Write the letter for most reactive nonmetal.
c) Name the family of elements represented by L, Q, R and T.
d) Name one element each and group II , III and V.
e) Name the elements represented by letter E and G respectively.
f) Write the structural formula of chloride of E.
Day 1(Chemistry)
a) The periodic table based on the basic fundamental property______ (atomic weight/ atomic number/electronic configuration).
Modern Periodic Table has :
b) Elements arranged increasing order in atomic___ (numbers/weights).
c) _____horizontal rows called_____(5/7/18/ periods/groups).
d) ____ vertical columns called____ (6/8/18/ period/ groups).
e) Transition from _
___to _&&_character across a period.( metallic/ non metallic).
f) Groups___ to___ sub-divided into A and B.( I/II/VI/VII)
g) Group ____to____are called 'normal' - ' representative elements'. (IA/II A/VIA/VIIA)
h) Group ____to____and____ are called 'transition elements'. (I B/VIB/VIIB/VIII)
i) Group _____at extreme____ contains 'noble gases' (I A/0/VIIA/right/left)
j) _______elements placed in group I A & II A. (reactive, metallic/reactive, non-metallic)
k) _____ elements placed in the upper right hand corner. (Non-metallic/metallic)
