1. propanal |
2. trichloroethanal |
3. methanal |
4. ethanal |
5. benzaldehyde |
A) 3 and 4 only
B) 3 and 5 only
C) 1, 2 and 3 only
D) 2, 3 and 5 only
E) 5 only
Correct Answer: D
Solution :
The carbonyl compounds must contain an \[\alpha -\]hydrogen atom to undergo aldol condensation. Thus, propanal and ethanal are the aldehydes that can undergo aldol condensation. However, methanol though does not contain \[\alpha -\]hydrogen atom yet undergoes cross aldol condensation in the presence of limewater. Thus, aldehydes that do not undergo aldol condensation are trichloroethanal, benzaldehyde and methanal.You need to login to perform this action.
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