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How many of following compound undergo a...

How many of following compound undergo aldol condensation Methanol, 2-Methylpentanal, bnzaldehyde, benzophenone cyclohexanone, 1-phenyl propanone, butan-1-ol,2,2-Dimethylbutanal.
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The correct Answer is:
4
Four aldehydes/ketones are : 2-methylpentanal, cyclohexanone, 1-phenylpropanone and phenyl- acetaldehyde contain `alpha`- hydrogens and hence undergo aldol condensation.
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