Answer :
Final answer:
The compound that will produce a secondary alcohol when reacted with a Grignard reagent is c) CH3CH2CHO, propanal.
Explanation:
The question is asking which compound among the given list will produce a secondary alcohol when reacted with a Grignard reagent. The correct answer is c) CH3CH2CHO (propanal). When a Grignard reagent reacts with propanal, it adds to the carbonyl group, forming an alkoxide intermediate which, upon acidic workup, yields a secondary alcohol.
This secondary alcohol has the OH group on a carbon which is attached to two other carbon atoms. The Grignard reaction with formaldehyde would form a primary alcohol, with other aldehydes it forms secondary alcohols, and with ketones, it forms tertiary alcohols.
