Question
The reagent that can be employed for the conversion $\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}_{2} \mathrm{OH} \rightarrow \mathrm{H}_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CHO}$ is(a) acidified $\mathrm{KMnO}_{4}$(b) alkaline $\mathrm{KMnO}_{4}$(c) $\mathrm{MnO}_{2}$(d) $\mathrm{Ag}_{2} \mathrm{O}$ moist
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