Question

The rate of reaction of which of the following is not affected by pressure?

• A. $ PCl_{3}+Cl_{2}\rightleftharpoons PCl_{5} $
• B. $ N_{2}+3H_{2}\rightleftharpoons 2NH_{3} $
• C. $ N_{2}+O_{2}\rightleftharpoons 2NO $
• D. $ SO_{2}+O_{2}\rightleftharpoons 2SO_{3} $

Answer 1

Answer: (C)

$\underset{1 vol }{ N _{2}}+\underset{1 vol }{ O _{2}} \rightleftharpoons \underset{2 vol }{2 NO }$
The number of molecule of reactants and product are equal in it. So that the reaction is not affected by pressure.