1.

Propanal and propanone undergoes condensation reaction in presence of dil . KOH to form,

Answer»

`CH_(3)CH_(2)CH(OH)CH_(2)COCH_(3)`
`CH_(3)C(OH)(CH_(3))CH(CH_(3))CHO`
`CH_(3)CH(OH) (CH_(3))CH_(2)CH_(2)CHO`
NONE of these

Solution :Whenaldehydes condenses with ketone, gives four condensation products. It is the`alpha `- hydrogen ATOM of the ketone which isinvolved in thecondensation reaction and produces major product.
`CH_(3)CH_(2)CHO + HCH_(2)COCH_(3) overset("dil . NaOH") tounderset(" 4- HYDROXY 2- hexanone")( CH_(3)CH_(2)CH(OH) CH_(2)COCH_(3))`


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