MCQ
$(A)$ and $(B)$ are


- AChain Isomer
- ✓Positional Isomer
- CMetamer
- DFunctional Isomer


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$(i)$ $A$ and $D$ both form blue-violet colour with ninhydrin.
$(ii)$ Lassaigne extract of $\mathrm{C}$ give positive $\mathrm{AgNO}_{3}$ test and negative $\mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}$ test.
$(iii)$ Lassaigne extract of $\mathrm{B}$ and D gives positive sodium nitroprusside test
Based on these observations which option is correct ?

$(I)\,\,PCl_3$ hydrolyses in the presence of moisture giving fumes of $HCl$
$(II)\,\,PCl_5$ exists as $[PCl_4]^-[PCl_6]^+$ in solid state
$(III)$ All the five bonds in $PCl_5$ molecule are equivalent
Choose the correct statements
