PERIODIC TABLE (IX)

1) Complete the statements given below pertaining to the different Chemists and their contributions towards classification of elements by choosing the correct words from the following list.

(Mendeleeff, Robert Boyle, Early chemists, Newland, Lavoisier , Dobernier, Carl Scheele, Moseley, Humphry Davy)

a) _____ attempted to classify elements on basis of their properties, metallic and non-metallic nature, valency etc, but the classification was discarded and atomic weight and not properties were considered for further classification.

b) _____classified elements into groups of three on observing a relationship between atomic weights of certain elements and their properties. He arranged elements in increasing order of atomic weights in group of three called triads.

c) ____ arranged elements in series in ascending order of their atomic weights and suggested a resemblance between the eighth and first element similar to the eighth and first notes on a musical scale.

d) _____ arranged elements in increasing order of their atomic weights and observed that elements with similar propertie appear at regular intervals on arrao. Such properties are called periodic properties and are those which appear at regular intervals in a periodic table. Examples such that properties are valency, electronegativity, metallic and non-metallic character .

e) _____stated that atomic number and non atomic weight of an element should be taken into consideration for classification of elements.

f) ______ periodic laws states that the physical and the chemical properties of elements are periodic functions of their atomic weights.

g) ____ arranged elements in increasing order of the atomic numbers in seven horizontal rows called periods and eighteen vertical columns called groups.

2) State the following with respect to table A and table B -- pertaining to classification of elements by different scientists .

a) Name the scientist whose law pertains to classification of elements as seen in table A.

b) State the law which pertains to classification of elements are seen in table A .

c) Name the scientist whose law pertains to classification of elements as seen in table B.

d) State the law which pertains to classification of elements as seen table B.

3) Give reasons for the following:

a) Classification of elements by early chemists on basis of properties, valencies and metallic and nonmetallic nature of elements was soon discarded.

b) Dobernier's Law of traids did not hold weightage as a standard for classification for all elements.

c) Newland's classification of elements led to much criticism.

4) Mendeleeff's Periodic Table 

The above table represents the first five periods of Mendeleeff's original periodic table of elements.

Answer the following with reference to mendeleeff's periodic table.

a) On what basis was the above classification of elements made by Mendeleeff.

b) State the terms used for the following pertaining to Mendeleeff's periodic table.

   i) The horizontal rows of elements in the predic table.

  ii) The vertical columns of the elements in the periodic table.

 iii) The properties which repeat themselves at regular intervals in the periodic table

c) State three contributions made by Mendeleeff which significantly helped to form the basis of the Modern Periodic Table.

d) Give reasons why Mendeleeff's Periodic Table was not completely accepted as the Modern Periodic Table.

5) FROM THE MODERN OR LONG FORM OF THE PERIODIC TABLE :

Answer the followings:

Name or state the following pertaining to the Modern Periodic Table .

a) The fundamental characteristics of an element which formed the basis of classification of elements in the Modern Periodic Table.

b) The number of horizontal rows - periods in the table.

c) The number of vertical columns - groups in the table.

d) The period which contains only two elements.

e) The periods which contains 8 elements.

f)  The period which contains the element having table electronic configuration 2,8,8.

g) The first elements of the periodic table.

h) The type of elements present the zero group of the periodic table.

i) The last element of the third short period.

j) The period which contains thelanthanide series which is situated at the bottom of the periodic table.

k) The groups which are further divided into sub-groups A and B .

6) Name or state the following pertaining to the elements of the periodic table.

a) The number of electron shells in the elements of periods 1, 2 or 3 respectively.

b) The electronic configuration of the zero group element period-1.

c) The number of valence electrons of the element in group IV of period-2 of the periodic table.

d) The valency of the elements of group I A, VIIA and zero group.

e) The group to which the elements carbon (at.no.6), nitrogen (at.no.7) and oxygen (at.no 8) belong.

f) The period to which sulphur (at.no 16) and chlorine (at.no 17) belong.

g) The electronegativite element from the elements sodium, magnesium and sulphur.

h) The type of bonding seen in the oxide of the element in periodic-3, group III A.

i) An element in period-3, group VA whose chloride exists in two different physical states.

j) The groups of the periodic table which contains the alkali metals , alkaline earth metals and the halogens respectively.

k) The grouping name given to the type of the elements present in groups 

a) I B to VIIB and VIII

b) I A to VIIA.

l) The non-metal positioned in group I A.

m) The series of chemically reactive metals of period -7 placed at the bottom of the periodic table.

n) The least electronegative elements from the elements chlorine, bromine and iodine in group VIIA.

o) The elements in period-2, group I A, which shows similarity with a divalit metal in period -3 group II A.

p) The non-metallic element in period-2 which is diatomic and unreactivate at ordinary temperatures.

7) State whether the following statements are true or false if false rewrite the correct statement.

a) Elements with similar outer electronic configurations are placed in the same period of the periodic table.

b) If properties of one member of a group is known, the properties of other members of the group could be correlated due to similarity or gradation in properties of elements in a group.

c) Non-metals occupy the upper right hand corner of the periodic table.

d) The two sub-groups A and B accommodate elements with similar properties.

e) Properties of elements remain the same on moving from left to right in the modern period table .

f) Electronegativity and non-metallic character of elements increases across a period from left to right and decreases down a group.

8) Complete the statements given below by filling in the correct word in the blank from the word/s in bracket.

a) The periodic table is based on the basis fundamental property____(atomic weight/atomic number/electronic configuration).

b) Elements arranged in increasing order of atomic___ (numbers/weights).

c) _____horizontal rows called_____ (5/7/18/periods /groups).

d) ____ vertical columns called____(6/8/18/periods /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) Grour____to_____are called 'Normal'- 'representative elements'.(IIA/IIA/VIA/VIIA)

h) Group____ to_____and____ are called 'Transition Elements' .(IB/VIB/VIIB/VIII)

i) Group____ at  extreme___ contains 'noble gases'. (IA/0/VIIA/right/ left)

j) _____elements placed in group IA & IIA. (reactive, metallic/ reactive, nonmetallic)

k) ______ elements placed in the upper right hand corner.(non-metallic/ metallic)

l) Periodicity in properties i.e., recurrence in properties are seen with elements belonging to the same____(period/group/sub-group ) in the periodic table after a difference of ___, ____, ____, or ____. (18/2/32/8) in atomic number due to recurrence of similar_____(atomic weights/number of shells/valence electronic configuration)

m) Alkali metals Li, Na are present in group _____. (IB/IA/IIA)

n) Alkaline earth metals Be, Mg are present in group____. (IA/IIA/IVA)

o) Post-transition metal - Al is present in group ____.(IIA/IIIA/VIA)

p) Transition metal - Fe is present in group____(VIIB/VIII/IB)

q) Transition metal - Zn is present in group _____(IB/IIB/IIIB)

r) Lanthanide series are present in period______(2/3/6/7)

s) Actinide series are present in period _______(2/3/6/7)

9) Name or state the following pertaining to elements of the first three periods:

a) The number of electron shells in period-1, 2 and 3 respectively.

b) The period number of the element 'X' having electronic configuration 2, 8, 8, 1.

c) The number of elements in the shortest period.

d) The number of short periods of the periodic table.

e) The metallic elements in period-2 and period-3.

f) The non-metallic elements in period-2 and period-3.

g) The element in period-2 and the period-3 having stable electronic configuration.

h) The elements in period-3 having 5 valence electrons.

i) The element in period-2 having electronic configuration 2, 4.

j) The period/s having 8 elements.

k) The element having one shell and one valence electron.

l) The period containing 

  i) rare Earth elements 

  ii) radioactive elements.

m) The bridge element in period-2 which has a diagonal relationship with aluminium in period-3.

n) A metalloid in period-3 0.

o) The valency of the elements in period-2 

     i) group- V

     ii) group 0.

p) The type of bonding of the chloride of the element in period-3 , group IIA.

q) The state of the chloride of the elements in period-3 group VIA.

r) Two property trends of elements which increse from left to right in a period.

10) Name of state the following pertaining to elements in group of the periodic table.

a) The number of valence electrons of the elements in group I A and in IIA.

b) The group number of the group having three columns of elements.

c) The group number to which lithium and sodium belong.

d) The group member to which magnesium and calcium belong.

e) The group number to which elements with 7 valence electrons belongs.

f) The type of elements present in group IB to VIIB & VIII.

g) The group to which inert , unreactive elements belong.

h) The group to which the most reactive metals belong.

i) The two property trends which remain same or similar down a sub-group.

11) Complete the table pertaining to Periodicity of elements by selecting the correct term/s in each case.

a) The Modern Periodic Table Law states that properties of elements are periodic functions of their____( atomic mass/molecular mass/ atomic numbers)

b) The properties which reappear at regular intervals in the periodic table are called______(atomic/period/ periodic properties )

c) _____is one of the periodic properties, predict in nature. (electronic configuration/ atomic radius/ electroni pull)

d) An element is said to be a _____ if it loses one or more electrons when supplied with energy. ( non-metal/ metal/ metalloid)

e) A_____is formed from a metal by loss of electrons.(Anions/cation/proton)

f) An elements 'X' an electron when supplied with energy. The electronic configuration of X is_____( 2, 8/2, 8, 1/2, 8, 7)

g)  An element 'Y' has atomic number seven and mass number fourteen. It's neutron/proton(n/p) ratio is ____(3/1.5/1)

h) In the same period or sub-group, increase or decrease in a particular(periodic ) property is due to gradual charge in _____.(atomic weight /atomic size/ electronic configuration) in the arranged elements.

12) Select the correct element in each case.

a) Select the element which show metallic character:- Na, Al, Si, P

b)  Select the elements which show non-metallic character- Be, C, Li, Cl

c) Select the elements which show metalloid characters:- Be, B, C, N, F, Si

d) Select the elements which have three electron shells - Li, B, Al, S

e) Select the element which has the common valency 3 - Li, Be, B, C, Al

RESPIRATORY SYSTEM (Human)

Matter - Test

1) MATCH THE COLUMN 

Column - I 

1) Have a definite mass and volume but no definite shape.

2) Are not rigid at all, can flow and take up the shape and volume of the container in which they are stored.

3) Are almost in compressible.

4) Have a definite mass but no definite volume or shape 

5) Have low density and are highly compressible.

6) Have any number of free surfaces.

7) Have one upper surface .

8) Have no free surfaces.

9) Are very slightly compressible.

10) Have a definite mass, volume and shape.

Column - II 

A) Solids

B) Liquids

C) Gases.

2) MATCH THE COLUMN 

Column - I 

1) All matter in any state is composed of

2) The particles are arranged in an way such that they have existing between them.

3) The particles attract each other with a 

4) The inter-particle attractive forces, with increasing distance

5) The particles are in continuous motion in possess 

6) The particles interact and also possess

Column - II 

A) potential energy 

B) force 

C) spaces or gaps 

D) particles 

E) kinetic energy 

F) decreases 

3) Name the state of matter whose characteristic correlates on the basis of the kinetic theory (Solid.Liquid/Gas).

Characteristics on the basis of kinetic theory 

1)  Kinetic energy of molecules is least.

2) Inetermolecular spaces is maximum.

3) Inetermolecular force of attraction is negligible.

4) Particles closely packed and can vibrate about their mean positions only.

5) Particles show minimum compactness and are free to move in any direction.

6) Kinetic energy of molecules is very large.

7) Particles less compact, and molecules free to move within the particular states of matter, without leaving It, hence the particular state can flow and has a definite volume.

8) intermolecular force of attraction is maximum and intermolecular space is minimum.

4) Correlate the terms in column II with their meaning in column I .

COLUMN I

process of changes from

1) solid state to liquid state at a particular temperature.

2) Liquid state to solid state at a particular temperature.

3) liquid state to gaseous state.

4) gaseous state to liquid state without fall in temperature.

5) solid state directly to gaseous (vapour state) without changing into liquid state:

COLUMN II 

A) solidification 

B) melting 

C) Vaporization 

D) Sublimation 

E) Condensation 

5)  Differentiate between the following terms.

a) Gaseous state and vapour state.

b) Sublimate and sublime.

c) Liquid and Fluid 

d) Matter and substance.

e) Fusion and vaporization.

6) Complete the statements pertaining to the interconversation of matter on the basis of kinetic theory by selecting the correct or appropriate word in each case.

a) Interconversion from solid to liquid state.

On heating a solid (at its melting point) the heat energy is absorbed/evolved and stored/transmitted as potential/kinetic energy. The inter-molecular distance increases /decreases and the intermolecular force of attraction decreases/increases. The molecules thus become comparatively free and the solid starts changing into the liquid state.

b) interconversion from liquid to gaseous state.

On heating a liquid (at its boiling point) the heat energy is evolved/absorbed and stored/transmitted as potential/kinetic energy. The energy increases/decreases the intermolecular distance and the force of attraction increases/ decreases drastically till it becomes almost zero/ negligible. The molecules thus become almost free and escape as gas or vapour .

c) Interconversion from gaseous to liquid state .

On liquification i.e., cooling a gas the Kinetic/potential energy is released in the form of heat/light energy. The  released energy causes a decrease/increase in the intermolecular distance and the force of attraction between the particles or molecules increases/decreases. The molecules thus come very close/ move apart and the gaseous state changes into the liquid state.

d)  Interconversion from solid to gaseous state

Sublimable solids e.g., iodine have very low/very high force of attraction between their molecules and have high/low potential energy stored in their molecules. On heating a sublimable solid, the intermolecular force of attraction is overcome almost completely/ to a small extent and the molecules escape from the surface of the solid in the form of vapour.

7) Define matter? State its important characteristics.

8) On the basis of kinetic theory explain why

A) solid have a fixed mass, volume and shape

B) liquids can flow easily

C) gases are highly compressible

D) solids have high density

E) gases have no free surface

9) What is meant by the term ' interconversion of matter'.

10) On the basis of kinetic theory explain the following conversion of the states of matter:

A) solid to liquid (melting)

B) gas to liquid (liquefaction)

C) solid to gas (sublimation)

D) liquid to gas(vaporization)

E) liquid to solid(solidification)

W. B(X) - SCIENCE TEST PAPERS

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     

4/10/24

COORDINATION IN LIVING ORGANISMS 

1) Select which of the following is the feature of tropic movement-

a) induced movement of curvature the particular parts of plant controlled by the direction in the stimulus.

b) It is one type of turgor movement.

c) induced movement of curvature of particular parts of plant controlled by the intensity of the stimulus.

d) Does not occur under the influence of Auxin. 

2) Select which of the following statements is correct related to tropic movement--

a) it is controlled by the intensity of the stimulus.

b) Overall change of place takes place by a plant or part of the plant.

c) This movement is observed in the algae called volvox.

d) it is an induced movement of curvature controlled by the direction of the stimulus. 

3) The tentacles on leaves of an insectivorous plant, called Sundew, bend to trap the insect as soon as they come in contact with the insect body. This is -

a) Seismonasty 

b) Thermonasty

c) Photonasity

d) chemonasty 

4) Some flowers open after sunrise and close after sunset. This is an example of--

a) Photonasty b) Seismonasty c) Chemonasty d) Thermonasty 

5) The stimulant of Chemonastic movement is-

a) light b) chemicals c) touch d) temperature 

6) Sunflower blooms in bright light, it is an example of-

a) thermonsty b) Seismonasty c) chemonasty d) Photonasty. 

7) The leaves of Mimosa plant drop down if touched. This is-

a) chemonasty b) Seismonasty c) phototropism d) phototactic movement. 

8) The instrument with which Sir J. C. Bose proved the phenomena of reacting to stimulus is

a) seismograph b) cresscograph c) lithograph d) sonometer. 

9) The moment of fern antherozoid to archegonium is called

a) Photonasty b) chemonasty c) nyctinasty d) Seismonasty 

10) The tactic moment controlled by electric current is

a) hydrotactic b) thermotactic c) rheotactic d) galvanotactic 

11) The moment of Dorsal leaflet towards insect is called

a) Photonasty b) chemonasty c) nyctinasty d) Seismonasty 

12) The plant movement depending upon the intensity of the stimulus is

a) tactic b) tropic c) nastic d) variation 

13) In comparison to geotropism, which one is a Greater force ?

a) chemotropism b) phototropism c) thigmotrophism d) phototropism 

14) Primary root is --(1) positively geotropic (2) positively hydrotropic (3) negative geotropic 

a) 1,3 correct b) 2,4 correct c) 1,2 correct d) 1,2,3 correct 

15) The movement of the tendril of pea is

a) nutation b) circumnutation c) phototropism d) thigmotrophism 

1) The P- V graphs of Boyle's Law related to gas is

2) What is the value of PV for 11.2 litres of an ideal gas at STP ?

a) 2RT b) RT c) 0.5RT d) 11.2 RT. 

3) According to Boyle 's law, which of the following is the PV-Pgraph ?

4) Which of the following is the SI unit of pressure ?

a) Nm² b) Nm⁻² c) Nm d) N.

5) Vapour density of gase is 32. Which of the following is its molecular weight ?

a) 8 b) 16 c) 32 d) 64 

6) At what pressure 500cc gas at a certain temperature and under 76cm pressure will have 400cc volume ?  

a) 100cm b) 200 cm c) 95cm d) none

7) The volume of a given mass of a gas 30°C and 765 Pa pressure is 15m³. What will be the volume of the gas at the same temperature and under 1.530x10² Nm⁻² pressure ? (given 1 Pa = 1Nm⁻²)

a) 7.5m³ b) 30m³ c) 12m³ d) 20m³ 

8) Choose the false statement among the following :

a) P vs 1/V plot is parallel to x-axis .

b) P vs V plot at constant temperature is a rectangular hyperbola.

c) V vs plot is a straight line passing through the origin.

d) PV vs P plot is a straight line parallel to x-axis.

9) For equal quantity of heat supplied to different gases taken in vessels of same volume, expension of the gases is

a) different b) equal c) both of them d) none 

10) If V₁ = V₀(1+ t/273) at which temperature the volume of a gas will be zero ?

a) 273°C b) - 273°C c) 0°C d) -32°C 

11) At a constant pressure with the increasing in temperature, the density of a gas

a) does not change b) decreases c) increases d) increases or decreases depending on the gas. 

12) if the pressure is doubled for a fixed mass of an ideal gas at a constant temperature, its volume becomes

a) 4 times b) 0.5 times c) 2 times d) remains same.

13) Value of 'R' in litre-atmosphere is 

a) 1.987 b) 1 c) 0.082 d) 4. 

14) at6 high temperature and low pressure, each gas behaves as

a) real gas b) Boyle's gas c) ideal gas d) Charle's gas. 

15) Which one of the following is not a unit of pressure ?

a) atm b) kb c) mm of Hg d) torr 

16) Pressure of a gas in a closed vessel is 

a) greater in downward direction

b) less in lateral and upward directions 

c) equal in all directions d) none of these 

17) A certain mass of gas is heated from 0°C to 273°C at constant q. Find the relation between the final and the initial volumes of the gas.

a) final voris thrice the initial volume 

b) final volume is twice the initial volume 

c) final volume is half the initial volume d) none 

18) Volume of a bubble rising upwards from deep below water 

a) decreases b) remain same c) increases d) none

19) Mathematical expression of Guy-Lussac's law is

a) P/T = constant b) P= 1/T c) P= kV d) PT = k

20) Number of electrons present in 1 gram H⁺ ions is

a) 6.023 x 10²³ b) 0 c) 12.046 x 10²³ d) none

21) The equation of state for 1 mole of an ideal gas is

a) PV= RT b) PV= nRT c) PV= kT/2 d) PV= nkT

22) The average kinetic energy of each molecule of a gas is 

a) kT/2 b) 3RT/2 c) 3RT/2n d) 3RT/2N₀

23) A gas filling a small vial when transferred to a large closed bottle, the gas occupies____

a) very small part in the bottle 

b) half part of the bottle 

c) full part of the bottle d) none

24) Average kinetic energy of gas molecule is

a) inversely proportional to Absolute temperature

b) proportional to Absolute temperature

c) square of Absolute temperature d) none

25) Under normal pressure boiling point of water in kelvin scale is

a) 100K b) 373K c) 273K d) none

26) What is the mass of 6.023 x 1023 oxygen atoms 

a) 6g b) 20g c) 14 g d) 16g

27) The volume of 0.7g of a gaseous compound at STP is 140 ml. What is its molecular weight ?

a) 70 b) 140 c) 100 d) 112 

28) What is the number of oxygen atoms in 0.2 mole of CO₂ ? (given, C=12, O= 16)

a) 3.0125 x 1023 b) 6.023 x 1023 c) 12.046 x 1023 d) 0

29) Vapour density of ammonia is 8.5. What is the mass of 2 moles of the gas.

a) 34g b) 25g c) 7g d) 14g

30) What is the number of nitrogen atoms in 22.4 litres of nitrogen gas at STP?

a) 3.0125 x 1023 b) 6.023 x 1023 c) 12.046 x 1023 d) 0 

31) Gas deviates from ideal gas nature because molecules

a) are colourless b) attract each other c) contains covalent bond d) show Brownian movement 

32) kinetic theory of gases proves 

a) only Boyle's Law b) only Charle's law c) only Avogadro's law d) all of these

 

33) the constant in Charle's law are

a) pressure and mass of gas

b) mass of gas and pressure 

c) pressure and temperature d) none 

34) A gas occupies 840ml at 14°C and 722 mm pressure. Its volume at STP will be 

a) 759ml b) 75.9ml c) 7.59ml d) 0.759ml

35) Mathematical expression of Boyle's law is

a) V∞ 1/P b) V= k/P c) PV = k d) all of them 

36) What is the number of molecules in 9 g water ?

a) 6.032 x1023 b) 12.046 x 1023 c) 3.0115 x 1023 d) none 

37) 0.32 gram of a gas occupies 224 volume at NTP. What is its the molecular weight ?

a) 32 b) 42 c) 52 d) 62

 

MULTIPLE CHOICE QUESTIONS 

CONCERNS ABOUT OUR ENVIRONMENT 

1) Which layer of atmosphere has the greatness density ?

a) troposphere b) stratosphere  c) mesosphere d) thermosphere

2) Which among the following gases does not help in the depletion of the ozone in the ozone layer ?

a) NO b) NO₂ c) CFC d) CO₂

3) which among the following gases absorb long wavelength infrared radiation emitted from the earth's surface ?

a) N₂ b) O₂ c) CH₄ d) He

4) Which of the following greenhouse gases has maximum contribution towards global warming ?

a) N₂O b) CH₄ c) CO₂ d) H₂O vapour 

 

5) Which of the following is not a greenhouse gas ?

a) methane  b) water vapour c) carbon dioxide d) oxygen 

6) The atmosphere layer in the which ozone layer exist is

a) troposphere  b) stratosphere c) mesosphere d) thermosphere 

7) Which is especially used for radio-communication ?

a) Stratosphere b) troposphere c) mesosphere d) thermosphere 

8) Due to the normal lapse rate temperature decrease with height at an average rate of 1°C per____ of height above sea level.

a) 167m b) 157m c) 162m d) 155m

9) The gas causing maximum destruction to ozone layer is

a) carbon dioxide  b) chlorofluorcarbon c) methane d) none of the above

10) The primary greenhouse gas is 

a) carbon dioxide  b) oxygen c) ozone d) none

11) An example of non conventional energy is 

a) coal b) geothermal Power c) mineral oil  d) none

12) The main constituent of LPG is

a) butane b) ethane c) butanone d) methane

13) if the ozone layer becomes THINNER, the Earth's surface will receive much more amount of the Sun's:

a) light rays b) Gamma rays  c) ultraviolet rays d) none

14) Of the total energy requirement in India, coal and biosmass fuel supply about:

a) 50%  b) 30%  c) 40% d) none

15) Cooking without fuel is possible in:

a) gas cooker b) solar cooker  c) pressure cooker d) none

16) which one among the following is not a fossil fuel ?

a) coal  b) petrol c) diesel d) ethanol 

17) radiowaves are reflected by 

a) troposphere b) stratosphere c)  ionssphere  d) thermosphere 

18) The main constituent of biogas is

a) N₂ b) CO₂ c) CH₄ d) H₂

19) SI unit of the calorified value of fuel is

a) k j/g b) cal c) k cal/g d) j