MCQ
In which pair second ion is more stable than first?


- A$(i)$ and $(ii)$
- ✓$(ii)$ and $(iii)$
- C$(ii)$ and $(iv)$
- D$(iii)$ and $(iv)$

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$Benzene$ $\xrightarrow{HCHO+HCl}\,A$$\xrightarrow{AgCN}\,B$

|
List$-I$ (Metal Ion) |
List$-II$ (Group in Qualitative analysis) |
| $(a)$ ${Mn}^{2+}$ | $(i)$ Group $- III$ |
| $(b)$ ${A} {s}^{3+}$ | $(ii)$ Group $- IIA$ |
| $(c)$ ${Cu}^{2+}$ | $(iii)$ Group $- IV$ |
| $(d)$ ${Al}^{3+}$ | $(iv)$ Group $- IIB$ |
Choose the most appropriate answer from the options given below :