Question

Value of Henry’s constant KH ____________.
(i) increases with increase in temperature.
(ii) decreases with increase in temperature.
(iii) remains constant.
(iv) first increases then decreases.


NCERT Class XII
Chemistry - Exemplar Problems

Chapter 2. Solutions

Answer 1

answer is
(iv) not related to the solubility of gases.

Answer 2

Value of Henry’s constant KH increases with increase in temperature.

Option A

Explanation:

• According to Henry's law, 'solubility of a gas' in a liquid is 'directly proportional' to the 'pressure of the gas'.

• It can be expressed via an equation P=KHX, where P is the' pressure of the gas', X is the 'solubility of gas in liquid' and KH is Henry's constant.

• Henry's constant 'KH' depends upon the 'nature of the liquid', 'nature of the gas' and the temperature.

• Hence with an increase in temperature KH increases and X decreases and vice versa.

• Thus option A does complete justice to the question.

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