Gas Laws, Class 11 Chemistry NCERT Solutions

1. There will be total 20  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. A mixture of two gases, having partial pressure p₁ and p₂, has total pressure p, then:

A.   p =  p₁ x p₂B. C. D.   p = p₁ + p₂

 A

 B

 C

 D

Question 1 of 20

2. The slope of plot between pV and p at constant temperature is:

  1

 2

 1/2

 Zero

Question 2 of 20

3. If the absolute temperature of V mL of a gas is doubled and the pressure reduced to one half, its new volume will be

 V / 4

  V mL

 2V mL

 4V mL

Question 3 of 20

4. At constant temperature, the pressure of a fixed amount of gas varies inversely with its volume, is

  Gay Lussac’s law

 Boyle’s law

 Avogadro law

 Charles’ law

Question 4 of 20

5. At constant pressure, the volume of a fixed mass of a gas is directly proportional to its absolute temperature, is

 Charles’ law

 Gay Lussac’s law

 Avogadro law

 Boyle’s law

Question 5 of 20

6. Dalton’s law of partial pressure states that

 The total pressure exerted by the mixture of non-reactive gases is equal to the sum of square of the partial pressures of individual gases.

 The total pressure exerted by the mixture of non-reactive gases is equal to the sum of the partial pressures of individual gases.

 The total pressure exerted by the mixture of non-reactive gases is equal to the sum of the cube of the partial pressures of individual gases.

 The total pressure exerted by the mixture of non-reactive gases is equal to the product of the partial pressures of individual gases.

Question 6 of 20

7. At constant volume, pressure of a fixed amount of a gas varies directly with the temperature, is

 Gay Lussac’s law

 Avogadro law

 Boyle’s law

 Charles’ law

Question 7 of 20

8. The vapour pressure of water at 300 K in a closed container is 0.82 atm. If the volume of container is doubled, its vapour pressure at 300 K will be

 56.3 atm

 0.82 atm

 8.45 atm

 2.43 atm

Question 8 of 20

9. The value of universal gas constant R depends on:

  Number of moles of gas

 Units of volume and pressure

 Volume of gas

 Temperature of gas

Question 9 of 20

10. Equal volumes of all gases under the same conditions of temperature and pressure contain equal number of molecules, is

 Avogadro law

 Gay Lussac’s law

 Boyle’s law

 Charle’s law

Question 10 of 20

11. Use of hot air balloons is an application of:

  Gay Lussac’s law

 Avogadro’s law

 Charles’ law

 Boyle’s law

Question 11 of 20

12. A vessel contains 0.16g of methane and 0.28g of nitrogen. The ratio of partial pressures of methane to nitrogen in the mixture is about:

 7 : 4

 1 : 1

 4 : 7

 2 : 3

Question 12 of 20

13. A balloon seller filled a balloon with 2 L air when the temperature was 23.4° C. He sold the balloon at the time when temperature was recorded to 26.1°C. Volume of the balloon at this temperature is

  2.5 L

 3.2L

 2.018 L

 1.24 L

Question 13 of 20

14. The equation which is in accordance with gas law is:

A. B. C. D.

 A

 B

 C

 D

Question 14 of 20

15. The lines obtained by plotting a graph between volume vs temperature are known as

 Isochors

 Isobar

 Isotherms

 Isotones

Question 15 of 20

16. One mole of N₂O₄ is kept in a close container at 300K and 1 atm pressure. When it is heated to 600 K 20% of it decomposes to NO₂ (g). Calculate the resultant pressure exerted on the walls of the container

 3.4 atm

 1.2 atm

 2.0 atm

 3.6 atm

Question 16 of 20

17. Which of the following reactions is possible in the given conditions?

  CO₂ and N₂O at room temperature

 CO₂ and C₂H₄ at room temperature

 CO₂ and CO at room temperature

 NH₃ and HCl at room temperature

Question 17 of 20

18. Two gases methane and oxygen are mixed in an empty container at 25°C the masses of both the gases are equal. Calculate the total pressure exerted by oxygen

 273 / 3 x 298

  1/2

 2/3

 1/3

Question 18 of 20

19. The density of the gas is equal to:

 T / V

 np

 pM / RT

 p /RT

Question 19 of 20

20. 10 g of a gas at 273 °C has a pressure of 1 atm. The temperature at which the pressure would be half at constant volume is:

 100 K

 100°C

 0 °C

  546 K

Question 20 of 20

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