Difficult
$Ag_2S + NaCN \to (A)$,$(A) + Zn \to (B)$
$(B)$ is a metal. Hence,$(A)$ and $(B)$ are:
$(B)$ is a metal. Hence,$(A)$ and $(B)$ are:
- A$Na_2[Zn(CN)_4], Zn$
- B$Na[Ag(CN)_2], Ag$
- C$Na_2[Ag(CN)_4], Ag$
- D$Na_3[Ag(CN)_4], Ag$
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