Assertion (A) `NaCl` reacts with concentrated `H_(2)SO_(4)` to give colourless fumes with pungent smell. But on adding `MnO_(2)` the fumes become greenish yellow.
Reason (R ) `MnO_(2)` oxidises HCl to chlorine gas which is greensh yellow.

Options

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is NOT the correct explanation of A
C. A is true but R is false
D. A is false and R is True.

Answer

A

Explanation

Colourless fumes of hydrochloric acid (HCl) become greenish yellow because `MnO_(2)` oxidises HCl to chlorine gas.