Question

A chemist interested in the reactivity of iodine concentrates his study on the decomposition of gaseous hydrogen iodide (Reaction 1).
$2HI\left(g\right)\leftrightharpoons H_2\left(g\right)+I_2\left(g\right)$
An increase in pressure in Reaction 1 would:

• A. produce more $I_2\left(g\right)$
  
• B. produce more $H_2\left(g\right)$
• C. not affect the system
• D. drive it to the right

Answer 1

The correct option is C not affect the system

The given reaction is:-

$2HI\left(g\right)\rightleftharpoons H_2\left(g\right)+I_2\left(g\right)$

Since, the no. of moles of gaseous species on both sides i.e. on reactants and products side are same, so, increase of pressure in this reaction do not affect the reaction.