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Iodoform test is not given by

1. (a) 2-Pentanone
2. (b) Ethanol
3. (c) Ethanal
4. (d) 3-Pentanone

Correct answer: (d) 3-Pentanone

Solution

The iodoform test is given by compounds with a methyl ketone group (CH3CO-) or secondary alcohols that can oxidize to methyl ketones. 3-Pentanone lacks the required methyl group adjacent to the carbonyl carbon, so it does not give the test.

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