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Identify the combination of compounds th...

Identify the combination of compounds that undergo aldol condensation followed by dehydration to produce but-2-enal

A

a) methanal and ethanal

B

b) two moles of ethanal

C

c) methanal and propanone

D

d) ethanal and propanone

Text Solution

Verified by Experts

The correct Answer is:
B
On reversing the process of aldol condensatin in the following mnner, we get two moles of ethanal.
`underset("But-2-enal") ( CH _(3) CH = CHCHO) overset( H _(2)O ) underset("Hydration ") to underset(beta -"hydroxy aidehyde or aldol") ( CH _(3) overset(OH) overset(|) (CH) - CH _(2) CHO)`
`underset("Reverseing")tounderset("Ethanal") ( 2 CH _(3) CHO )`
Thus, the combination of compounds to give the given product is two moles of ethanal.
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