Assertion : A solution of `NH_(4)` Cl in water is acidic in nature,
Reason : Ammonium ions undergo hydrolysis to form`NH _(4) OH and H .`

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but(R) is not the correct explanation of (A)
C. If(A) is correct, but (R) is incorrect
D. If both (A) and (R) are incorrect

Answer

A

Explanation

`NH _(4) Cl _((aq)) to NH _((eq)) ^(+) eta Cl _((aq)) ^(-) NH _(4) ^(+)` ions förmed undergo hydrolysis withxater to form `NH_(4)OH and H^(+)` ions. `NH _(4) OH` is a weak base and thus remains almost unionised in solution. As a result, `[H^(+)]` ions increase in solution, making the solution acidic.