Q. When KI is added to acidified solution of sodium nitrite then
A) NO gas is liberated and $I_{2}$ is set free
B) $N_{2}$ gas is liberated and HI is produced
C) $N_{2}O$ gas is liberated and $I_{2}$ is set free
D) $N_{2}$ gas is liberated and HOI is produced
Explanation
(a)
When KI is added to acidified solution of sodium nitrite NO gas is liberated and $I_{2}$ is set free.
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 2I^{-} + 4H^{+} + 2NO_{2}^{-}\ \longrightarrow 2NO + I_{2} + 2H_{2}O$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.