Discussion
When propanone is treated with Zn/Hg and Con.HCl propane is formed. This reaction is known as
Answer: B
The reaction is the Clemmensen reaction (Clemmensen reduction).
Zinc amalgam and concentrated hydrochloric acid reduce the C=O group of an aldehyde or ketone to CH2, so propanone gives propane.
The Wolff-Kishner reduction does the same conversion but with hydrazine and KOH in ethylene glycol. Hofmann's reaction converts amides to amines, Kolbe's reaction converts phenol to salicylic acid, and the Cannizzaro reaction disproportionates aldehydes without α-hydrogen.
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