Q. 1 mole of $H_{2}\ and\ 2\ moles\ of\ I_{2}$ are taken initially in a 2 L vessel. The number of moles of $H_{2}$ at equilibrium is 0.2. Then, the number of moles of $I_{2}and\ HI$ at equilibrium are
A) 1.2, 1.6
B) 1.8, 1.0
C) 0.4, 2.4
D) 0.8, 2.0
Explanation
(a)
$H_{2}\ \ \ \ \ \ \ \ \ \ \ I_{2}\ \ \ \ \ \rightleftharpoons \ \ \ \ \ \ 2HI$
Initially 1 mol 2 mol 2 mol
At equili 0.2 mol 2-0.8 2 0.8
1.2 mol 1.6 mol
Amount of $H_{2}\left( and\ hence\ I_{2} \right)\$consumed
$1 - 0.2\ \ \ \ \ \ \ \ \ 0.8$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.