Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent?
Correct answer: A. CH3CH2OH
- A. CH3CH2OH
- B. CH3COOCH3
- C. CH3COCH3
- D. CH3CHO
Explanation
A Grignard reagent reacts with compounds containing active H atom, such as water, ammonia, amines, alcohols, alkynes etc., to form a hydrocarbon. It does not form hydrocarbon with ethanal and propanone. CH3CH2OH will form a hydrocarbon on reaction with Grignard's reagent as on reaction with Grignard's reagent −OH group will get replaced by the R− group of RMgX leading to the formation of hydrocarbon.
This question appeared on the NUMS 2014 paper, which you can sit online with every answer explained.
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Alcohols contain a hydroxyl group attached to a saturated carbon atom and are classified as primary, secondary or tertiary. Their nomenclature, hydrogen bonding, acidity, oxidation, dehydration, reaction with sodium and conversion to haloalkanes are covered, along with the distinction between alcohols and phenols, where the hydroxyl group is attached directly to an aromatic ring.
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