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Question

CH3CNdil.HCl−−−ALiAlH4−−−BPCl5−−CAlc.KOH−−−−−D.
The product D in the above sequence of reactions is:

A
acetaldehyde
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B
ethyne
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C
ethene
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D
acetyl chloride
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Solution

The correct option is C ethene
The product D in the above sequence of reactions is ethene CH2=CH2

CH3CNdilHClCH3COOHLiAlH4CH3CH2OHPCl5CH3CH2Clalco.KOHCH2=CH2

The hydrolysis of acetonitrile with dil HCl gives acetic acid.

Reduction with lithium aluminium hydride gives ethyl alcohol.

Treatment with phosphorous pentachloride gives ethyl chloride.

Dehydrohalogenation with alc KOH gives ethene.

Option C is correct.

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