Q. Which one of the following pairs of substances when mixed, produces chlorine gas at room temperature?
A) $NaCl\ and\ MnO_{2}$
B) $NaCl\ and\ HNO_{3}\ (conc)$
C) $NaCl\ and\ H_{2}SO_{4}\ (conc)$
D) $HCl\ (conc)\ and\ KMnO_{4}$
Explanation
(d)
$2KMnO_{4} + 3H_{2}SO_{4} + 10HCl \rightarrow K_{2}SO_{4} + 2MnSO_{4} + 8H_{2}O + 5Cl_{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.