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Q.

Which of the following does not respond to iodoform test

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a

Methanol

b

Acetone

c

Acetaldehyde

d

Ethanol

answer is B.

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Detailed Solution

The presence of a methyl ketone is confirmed by performing this test. The compound is heated in the presence of base and iodine or bromine. The product iodoform or bromoform is yellow and has a characteristic odour. This confirms the presence of methylated ketone. Acetaldehyde has Me-C=O, Hence it gives positive test.  Methanol do not satisfy this condition.

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