MCQ
The geometry of $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ is:
- ATetrahedral
- ✓Square planar
- CTriangular
- DOctahedral

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$(A)$ $P$ $(B)$ $Q$ $(C)$ $R$ $(D)$ $S$
$(i)$ Neither with Fehling's solution nor with Tollen's reagent
$(ii)$ Only with Tollen's reagent but not with Fehling's solution
$(iii)$ With both Tollen's reagent and Fehling's solution. If they contained either ethanal (acetaldehyde) or propanone (acetone) or benzal (benzaldehyde), which bottle contained which
