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Which of the following compounds will give a yellow precipitate with iodine and alkali?

1. Acetophenone
2. Acetamide
3. Methyl acetate
4. 2-Hydroxypropane

Correct answer: 2-Hydroxypropane

Solution

2-Hydroxypropane (isopropanol) contains a methyl group attached to a carbon bearing a hydroxyl group, which reacts with iodine and alkali to form a yellow precipitate of iodoform.

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