MCQ
$Cu^{2+}(aq.)$ does not undergo redox reaction with solution of
- ✓$(NH_4)_2S$
- B$Na_2S_2O_3$
- C$KI$
- D$NH_4SCN$
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Total number of optically active isomers shown by $\mathrm{C}_4 \mathrm{H}_8 \mathrm{Cl}_2$, obtained in the above reaction is......................