Chemistry Question from JEE Main 2024 · 6 April, Shift 1

Consider the following test for a group-IV cation:

$M^{2+} + H_2S \rightarrow A \text{ (Black precipitate)} + \text{byproduct}$

$A + \text{aqua regia} \rightarrow B + \text{NOCl} + S + H_2O$

$B + \text{KNO}_2 + \text{CH}_3\text{COOH} \rightarrow C + \text{byproduct}$

The spin-only magnetic moment value of the metal complex $C$ is ........ BM (Nearest integer).