Q. Which of the following is used to prepare Cl_{2} gas at room temperature from concentrated HCl?
A) MnO_{2}
B) H_{2}S
C) KMnO_{4}
D) Cr_{2}O_{3}
Explanation
(c)
$2MnO_{4}^{-}\ + 16H^{+} + 10Cl^{-} \longrightarrow 2Mn^{2 +}\ + 5Cl_{2} + 8H_{2}O$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.