Assertion (A): `Sb^(3+)` is not precipitated as sulphide when `H_(2)S (g)` is passed in alkaline solution.
Reason (R) : `[S^(2-)]` ion in basic medium is inadequate for precipitation.

Options

A. If both assertion and reason are true and reason is the explaination of assertion.
B. If both assertion and reason are true but reason is not the correct explaination of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

C

Explanation

Sb(III) is a basic radical of IIB group for which group reagent is `H_(2)S`in presence of dilute HCI.It is necessary to maintain the proper hydrogen ion concentration for the precipitation of Iind group cations and to check the precipitation of IV group cations.