Time: 3 hours 15 minutes.
Full Marks: 90
--------------------------------------------------------
Group A
Question 1
MCQ type question: (All questions are compulsory). 1x 15= 15
Each of the following questions has four alternatives. Write the correct one
1.1. Which is not the source of non conventional energy ?
A) solar energy B) wind energy C) coal D) tidal energy
1.2. Charles'law V-t graph Shows the temperature
A) 100C B) -273C C) 0C D) 273C
1.3. The vapour density of an alkyne is 20. The number of H atom in that alkaline is
A) 3 B) 4 C) 2 D) 0
1.4. Which one is the unit of Coefficient of volume expansion
A) m³ B) °F⁻¹ C) °C D) m⁻³
1.5. The linear magnification of lens becomes unity, when
A) u= 2v B) u= 0 C) 2u= v D) u= v
1.6. An object is placed in front of a concave mirror, produces a real and magnified image. If the focal length of the mirror is 20cm, the position of the object is
A) 40cm B) 30cm D) 10cm D) 50cm
1.7. The equivalent resistance of 20 ohm each connected in parallel is
A) 10ohm B) 100ohm C) 1ohm D) 20ohm
1.8. The current passing through an electric iron has been doubled. The heat produced will be
A) half B) double C) one-fourth D) four times
1.9. Number of neutrons present in Alpha particle is
A) 2 B) 4 C) 1 D) 0
1.10. Mendeleev's periodic table is based on
A) atomic radius B) atomic volume C) atomic number D) atomic weight
1.11. In formation of which of the following compounds octet rule is not obeyed?
A) NaCl B) LiH C) KCl D) MgO
1.12. H₂S is a
A) weak, dibasic acid
B) weak, monobasic acid
C) strong, monobasic acid
D) strong, diabetic Acid
1.13. which one of the following is Sulphide Ore
A) bauxite B) zinc blend C) rock salt D) hematite
1.14. Which is produced at cathode during electrolysis of dilute aqueous solution of NaCl
A) Na B) H₂ C) Cl₂ D) O₂
1.15. If the general formula of alkene is CₙH₂ₙ , then the lowest value of n will be
A) 1 B) 2 C) 3 D) 0
Group B
Question 2 . (1x17)+4= 21
Answer the following question ( alternatives are to be noted):
2.1. Which atom emerged from chlorofluorocarbon under the influence of UV rays does dissociate ozone gas into oxygen.
OR
In which layer the density of atmosphere is maximum
2.2. Mention one harmful effect of global warming.
2.3. A gas has vapor density 32. What will be the mass of 5.6 L. of the gas ?
2.4. Write the conditions a real gas behaves in an ideal fashion.
2.5. The S.I unit of thermal resistivity is........
OR
Which type of mirror is used as 'shaving mirror'
2.6. What type of image is always made by a concave lens ?
2.7. What is the relation between focal length and radius of curvature of a spherical mirror?
2.8. For series combination of resistors, which physical quantity remains same for each of the resistors?
2.9. Tick the right answer :-
An AC generator works on the principle of (magnetic effect of current/electromagnetic induction)
2.10. Define mass defect ?
OR
How many neutrons are released in each fission reaction ?
2.11. Match the Column:
Column A. Column B
a) Extracted by reduction Cs
b) present in duralumin. Zn
c) extracted from hematite Fe
d) highly electropositive Mg
2.12. What will be the formula of the compound produced from X and Y ? (X= 13, Y= 70)
2.13. Name the electrolyte used in gold plating of article through electrolysis ?
OR
Give an example of weak electrolyte
2.14. Which of the following are non electrolytes ?
common salt solution, sugar solution, HCl acid & alcohol.
2.15. what will be the product when H₂S is passed through aqueous of Silver nitrate ?
OR
Name the chemical used in the laboratory preparation of Nitrogen gas .
2.16. What will be that colour of the precipitate formed when aqueous solution of ammonia reacts with aqueous solution of Ferric chloride.
2.17. Give the structural formula of propan-1-al.
2.18. Name the monomer of Teflon.
Group C
Question 3. Answer the following questions (Alternatives are to be noted). 2x 9= 18
3.1. What are CBM and methane hydrate?
3.2. Calculate the density of 4 mol hydrogen gas at 8 atm pressure and 300 K temperature. (R= 0.082 lit. atm mol⁻¹K⁻¹)
OR
Calculate the final volume of a gas if pressure orginerally at STP is doubled and it's temperature is made three times.
3.3 What type of lens should be used to correct myopia. (2)
OR
Draw a ray diagram to show the formation of virtual and erect image by a converging lens. Is the magnification positive or negative ? 3/2+ 1/2
3.4. a) EMF of a cell is 1.5 volt- Explain.
b) what is the SI unit of Resistivity ?
OR
Draw the I-V graph of Ohm's Law. 1+1
3.5 A nucleus of an element X has the symbol ²⁰²X₈₄. It emits an Alpha particle then two Beta particles and the final nucleus becomes ᵃY꜀. Give the value of a and c.
3.6. Differentiate between covalent and ionic compounds.
3.7. Give the reducing property of NH₃ with a reaction.
3.8. Write the reaction of cathode and anode in the electrolysis of copper sulphate solution using copper electrodes.
OR
Give one use of each of Zinc and Iron.
3.9. What is the denatured spirit ? Give an use of it.
OR
How can you convert Ethanol or Ethylene ?
Group D
Question 4. 3x22= 36
Answer the following questions. (Alternatives are to be noted):
4.1. What Boyle's law. What is the common constant of Boyle's and Charles law?
4.2. How much amount of Ferrous sulphide reacts with dilute H₂SO₄ to get 1.12L H₂S at NTP ? (Fe= 56, S= 32, O= 16)
OR
How much quantity of Ammonium Nitrite is required to be heated to obtain 8.4 gram of Nitrogen ? (N= 14, H =1)
4.3. a) In a bimetallic strip, brass expands more than Iron, what does it prove ?
b) The coefficient of superficial expansion of metal is 3.6 x 10⁻⁵/°C. Find its coefficient of cubic expansion.
c) How does the Coefficient of thermal conductivity depend on the thickness of the conductor ? 1+1+1
OR
a) Prove that the real expansion of a liquid is always greater than the apparent expansion.
b) Change the CGS unit of thermal conductivity to its SI unit. 2+1
4.4. A ray of light passes through a Prism. By giving a suitable diagram show that < D + < A = < i + < e, where D is angle of deviation, A is angle of prism, i is the angle of incidence and e is the angle of emergence.
4.5. a) state the laws of refraction.
b) why do we say Refractive index of water is 1.33 ? 2+1
OR
a) Write one use of concave mirror.
b) which ray has the highest frequency ?
c) 'Red light suffers less scattering' Why? 1+1+1
4.6. a) what is Flemming's left hand rule ?
b) Name two safety measures commonly used in electrical circuit and appliances. 1+2
4.7. a) Write one difference between electromotive force and potential difference.
b) 3 resistances 3, 3, 3 ohm arranged in parallel and joined a 2 ohm in series
calculate the equivalent resistance.
c) Two resistors of 2ohm and 3ohm are first connected in series and then in parallel combination. In which combination the equivalent resistance will be smaller than the value of each resistors. 1+1+1
OR
a) how much joule of energy is equivalent to one BOT ?
b) calculate the current through a 200V-60W lamp.
c) Write one advantages of AC over DC. 1+1+1
4.8. Ionising power of Alpha ray is more than Gamma ray. Why ?
b) Why do we use Boron rods in a nuclear reactor ?
c) What are the daughter elements ? 1+1+1
4.9. Arrange the following elements (Al, Mg, Si, Na) in increasing order of their:
a) atomic size
b) electronegativity
c) Ionisation energy. 1+1+1
OR
Give any two points in favour of hydrogen to be placed with the alkali metals. How many elements are present in the second period of periodic table ? 2+1
4.10. During electrolysis of water--
a) which gases are liberated at cathode and anode ?
b) give the reaction at cathode ?
c) Why acidulated water is used ? 1+1+1
4.11. give the reactions of the manufacture of nitric acid by Ostwald's process. 3
4.12. How can you convert Ethylene to Ethane ? What is the type of reaction called ? 2+1
OR
a) complete the following reactions
i) CH₃COOH + NaOH -->
ii) CH₃COOH + C₂H₃OH --- (Conc. sulphuric acid 70°- 80°C)
b) Give an example of natural polymer.
MODEL TEST PAPER -1
Group A
1) Multiple choice questions. Four alternative answers are given for each of the following questions. write the correct one. 1x15=15
1.1) Which of the following is the SI unit of pressure?
A) N-m² B) N-m⁻² C) N-m D) N
1.2) vapour density of a gas is 32. Which of the following is its molecular weight?
A) 8 B) 16 C) 32 D) 64
1.3) On which of the following does the thermal conductivity of a metal depend ?
A) temperature B) length C) nature material D) area of the cross section
1.5) what is the relation between the radius of curvature and the focal length of a mirror ?
A) f= 2r B) f= r/2 C) f= r/3 D) f= 3r/2
1.6) which of the following Colours deviates most when white light is refracted by a prism ?
A) red B) yellow C) violet D) green
1.7) which of the following physical quantities represents ampere?
A) coulomb-second B) volt-ohm⁻¹ C) vt-ohm D) volt⁻¹-ohm
1.8) Resistivity of which of the following decreases with increase in temperature ?
A) conductor B) semiconductor C) superconductor D) insulator
1.9) Which of the following is the correct order of ionising power for α, β, and γ rays ?
A) α> β> γ B) α> γ> β C) γ> β>α D) β> α> γ
1.10) Which of the following has the highest atomic radius ?
A) K B) H C) Li D) Na
1.11) In which following a covalent bond is present ?
A) hydrogen chloride B) sodium chloride C) lithium hydride D) calcium oxide
1.12) Which of the following is a weak electrolyte in aqueous solution?
A) CH₃COOH B) NaOH C) H₂SO₄ D) NaCl
1.13) Which of the following is used to dry moist ammonia ?
A) H₂SO₄ B) P₂O₅ C) CaO D) CaCl₂
1.14) Which of the following is an ore of aluminium?
A) bauxite B) hematite C) malachite D) chalcopyrite d
1.15) which of the following is the functional group of aldehydes ?
A) -OH B) -CHO C) > C= O D) -COOH
GROUP - B
2) Answer the following questions ( Alternatives are to be notes):
2.1) fill in the blanks:
in troposphere temperature___ with increase in altitude. (1)
OR
Mention one harmful effect of global warming.
2.2) Which atom, released from a chlorofluoro carbon under the influence of UV rays, decomposes Ozone into oxygen ? (1)
2.3) Write whether the following statement is true or false :
under the same condition of temperature and pressure equal volumes of CO₂ and N₂ gas contain different number of molecules. (1)
2.4) write down the relation between the pressure and volume of a given mass of a gas according to Boyle's law when temperature remain constant. (1)
2.5) Between the apparent and real expansion of co-efficients of a liquid, which one is its own characteristic ? (1)
OR
What is the SI unit of thermal conductivity ?
2.6) Give a natural example of dispersion of light. (1)
2.7) which type of lens can rectify myopic vision? (1)
2.8) What will be the change in the motion of a Barlow's wheel if the direction of the current is the reversed? (1)
2.9) How much work has to be done when a one column of charge is taken against a potential difference of 1 volt ? (1)
2.10) From which part of a radioactive atom is Beta- particles emitted? (1)
OR
what is the atomic number of the daughter element produced if an particle is emitted from ²³⁸₉₂U ?
2.11) Match the column A to B:
Column A
1. A transition element
2. A transuranium element.
3. Reduces Fe₂O₃ at high temperature in the thermit process.
4. present in the alloy bell metal.
Column B
A) aluminium
B) Nickel
C) Tin
D) plutonium 1x 4
2.12) Draw Lewis dot diagram of F₂ molecule. (F = 9). (1)
2.13) Why the electrical conductivity of the solution produced by adding little sulphuric acid into pure water is more than the electrical conductivity of pure water ?
OR
what are the carriers of electricity in the solution during the electrolysis of an aqueous solution of an electrolyte ? (1)
2.14) Which ion migrates towards the cathode during the electrolysis of aqueous solution of CuSO₄ using Cu-electrodes. (1)
2.15) write down the formula of the black precipitate formed when H₂S gas is passed through an aqueous solution of lead nitrate?
OR
What change of colour is observed when H₂S gas is passed through an acidified aqueous solution of potassium dichromate ? (1)
2.16) Two substances are used in the production of Urea. One is ammonia, what is the other ? (1)
2.17) Mention one use of poly (vinyl chloride). (1)
2.18) write down the IUPAC name of CH₃CH₂CH₂OH. (1)
OR
Write down the constitutional formula of an isomer of CH₃CH₂OH
Group - C
3) Answer the following questions (Alternatives are noted):. 2x 9
3.1) what is the mean by calorific value of a fuel? Between coal and diesel which has greater calorific value?
3.2) If the volume of a given mass of a gas at STP is 52 m³, what will be its volume at the pressure of 104 cmHg temperature remaining constant ?
3.3) How does the refractive index of a medium depend on the velocity of light ?
OR
What kind of mirror is used in the headlight of a car and why ?
3.4) Mention two advantages of using CFL lamp over an incandescent lamp.
3.5) An aqueous solution of sugar cannot conduct electricity, but an aqueous solution of sodium chloride can. why ?
OR
why is it appropriate to use the term formula weight instead of molecular weight in case sodium chloride ?
3.6) compare the following two properties of naphthalene and sodium chloride: melting point and solubility in water.
3.7) Name a gas which can be prepared in Kipo's apparatus. write the balanced chemical equation of the reaction for the preparation of the gas.
3.8) How is metallic zinc obtained from the zinc oxide ? Write the reaction with balanced chemical equation.
OR
what happens when a piece of zinc is added to an aqueous solution of CuSO₄ ? Show with the help of electronic theory that this is an oxidation-reduction reaction.
3.9) Show with the help of structural formula ethylene that is an unsaturated hydrocarbon.
OR
what is denatured spirit ?
Group - D
4) Answer the following questions (Alternatives are to be noted):
4.1) State Charles' law related to gases and represent it graphically (V vs t). (3)
4.2) How many gram of ammonium Sulphate will be required to prepare 6.8g of ammonia by heating Ammonium Sulphate with caustic soda solution ?
OR
CaCl₂ , CO₂ and H₂O are produced by the reaction of dilute HCl with CaCO₂, How many gram of HCl will be required to prepare 55.5g of CaCl₂, 22.0g of CO₂ and 9.0 of H₂O from 50.0g of CaCO₃ ? What is the number of mole of HCl required? (,H= 2, Cl= 35.5). 2+1
4.3 What is the volume expansion coefficient of a gas at fixed pressure? What is its value? 2+1
OR
Mention two similarities between heat conduction and electrical conduction, Mention a nonmetal having high thermal conductivity.
4.4) State the two law of refraction of light. Write also the mathematical form of the second law. (2+1)
4.5) In case of concave mirror find the relationship between focal length and the radius of curvature.
OR
A ray of light passes through a prism. Show that the angle of deviation
δ= i₁ + i₂ - A. (Symbols have usual meaning). (3)
4.6) Write Faraday's law of electromagnetic induction. What is meant by alternating current ? 2+1
4.7) An electric bulb resistance 440 ohm is connected to 220 volt mains for 10 hours. Find the amount of electrical energy consumed in BOT unit. (3)
Oar
A metal wire resistance 6 ohm is stretched to so that its length becomes double of its original length. What would be the final resistance ? (3)
4.8) What is mean by mass defect ? what is the source of energy released in nuclear fusion ? 2+1
4.9) write with an example what is mean by periodic property of elements ? Mention a property which is not periodic. 2+1
OR
What is the meant by electronegativity of an element ? How does electronegativity of Group 1 elements of the long periodic table change from top to bottom ?
4.10) which energy responsible for the chemical reaction to occur during electrolysis ? what reaction do occurr at the cathode and the anode during electrolysis of acidulated water ? 1+2
4.11) Write balance chemical equation with conditions for the industrial manufacture of SO₃ from SO₂ by the contact process. How is H₂SO₄ prepared from the SO₃ produced ? 2+1
4.12) Write balanced chemical equation of the addition reaction of hydrogen with acetylene mentioning the conditions of reaction. Mention one use of LPG.
OR
how do you convert ?
CH₃CH₂OHCH₂ = CH₂
How is biopolymer protein biodegradaed in nature ? 2+1
No comments:
Post a Comment