Question

EY The reaction is at yumunu 7) - 7) of the following equilibria, only will shift to the right in response to a decrease in volume. A) N2(g) + 3H2(g) + 2NH3 (8) B) H2(g) + Cl2 (8) 2 HCl (g) C) 2 Fe2O3 (s) = 4 Fe (s) + 302 (8) D) 2HI (8) H2(g) + 12 (8) E) 2 SO3 (8) 2 SO2(g) + O2(g) 8) 8) The magnitude of Kw indicates that A) water autoionizes very slowly B) water autoionizes very quickly C) the autoionization of water is exothermic D) water autoionizes only to a very small extent a)

Answer 1

7)

Decreasing volume will increase the pressure which in turn shift the reaction in a direction which have lesser gaseous molecules as per Le chatelier Principle

Here reaction shift to the right.

So, product should have lesser number of gases as compared to reactant.

This is true for option A

Answer: A

8)

Kw is thermodynamics constant.

It can’t predict the rate of ionisation.

Kw value is small and it means that the extent of auto ionisation of water is small.

Answer: D