Q. The pH of a solution of $H_{2}O_{2}$ is 6.0. Some chloride gas is bubbled into this solution. Which of the following is correct?
A) The pH of resultant solution becomes 8.0
B) Hydrogen gas is liberated from resultant solution
C) The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated
D) $Cl_{2}O$ is formed in the resultant solution
Explanation
(c)
$H_{2}O_{2} + \ Cl_{2}\ \rightarrow 2HCl + O_{2}$
HCl is formed by the reduction of chlorine by $H_{2}O_{2},$ hence pH further decreases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.