Assertion (A): HCl gas is dried by passing through concentrated H 2 SO 4 . Reason (R): HCl gas reacts with NH 3 that gives white fumes

Question

Assertion (A): HCl gas is dried by passing through concentrated H 2 SO 4 . Reason (R): HCl gas reacts with NH 3 that gives white fumes, Both (A) and (R) are correct and (R) is the correct explanation of (A), Both (A) and (R) are correct and (R) is not the correct explanation of (A), (A) Is correct but (R) is incorrect, (A) Is incorrect but (R) is correct

MARKS App · Accepted Answer

In laboratory, HCl is prepared by heating sodium chloride with concentrated sulphuric acid. NaCl + H 2 SO 4 → 420 K NaHSO 4 + HCl NaHSO 4 + NaCl → 823 K Na 2 SO 4 + HCl HCl gas can be dried by passing through concentrated sulphuric acid as concentrated sulphuric acid being hygroscopic in nature as it absorbs moisture from the air and gets diluted and acts as a drying agent. It has a strong affinity for water and thus it absorbs water quickly. HCl reacts with NH 3 and gives white fumes of NH 4 Cl. NH 3 + HCl → NH 4 Cl Assertion and reason are correct but the given reason is not the correct explanation of the assertion.

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