Chemistry Class-11: Chapter – 7. Equilibrium Part – 3 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question: 16

On increasing the pressure, in which direction will the gas phase reaction proceed to re- establish equilibrium, is predicted by applying the Le Chatelier՚s principle. Consider the reaction.

Which of the following is correct, if the total pressure at which the equilibrium is established, is increased without changing the temperature?

(i) K will remain same

(ii) K will decrease

(iii) K will increase

(iv) K will increase initially and decrease when pressure is very high

Answer: (i)

Justification: According to Le-Chatelier՚s principle, at constant temperature, the equilibrium composition will change but K will remain same.

Question: 17

What will be the correct order of vapour pressure of water, acetone and ether at . Given that among these compounds, water has maximum boiling point and ether has minimum boiling point?

(i)

(ii)

(iii)

(iv)

Answer: (ii)

Question: 18

At , equilibrium constant, , for the following reaction is .

What would be the equilibrium constant for the reaction?

(i)

(ii)

(iii)

(iv)

Answer: (i)

Question: 19

In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume?

(i)

(ii)

(iii)

(iv) The equilibrium will remain unaffected in all the three cases.

Answer: (iv)