JEE Mains · Chemistry · STD 11 - 6.2. Equilibrium - II (icon Equilibrium)
Find the compound ' A ' from the following reaction sequences.
\(\mathrm{A} \xrightarrow{\text { aqua-regia }} \mathrm{B} \xrightarrow[\text { (2) } \mathrm{AcOH}]{\text { (1) } \mathrm{KNO}_2 \mid \mathrm{NH}_4 \mathrm{OH}} \text { yellow ppt }\)
- A CoS
- B ZnS
- C NiS
- D MnS
Answer & Solution
Correct Answer
(A) CoS
Step-by-step Solution
Detailed explanation
Compound \((A)\) in the given reaction sequence is likely to be CoS. \(\begin{aligned} \mathrm{CoS}+\mathrm{HNO}_3+3 \mathrm{HCl} \rightarrow \mathrm{Co}^{2+} & +\mathrm{S} \downarrow+\mathrm{NOCl} \uparrow \\ & +2 \mathrm{Cl}^{-}+2 \mathrm{H}_2 \mathrm{O}\end{aligned}\) The…
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