AP EAPCET 04-Jul-2022 Shift 1 Paper

HCl gas is dried by passing through the drying agent i.e. concentrated sulphuric acid. So, assertion is correct.
HCl reacts with NH3 to give white fumes of ammonium chloride.
HCl+NH3→‌

NH4‌Cl

‌ white fumes ‌

.
So, reason is also correct. But reason is not a correct explanation of assertion.