Which of the following alcohols does not give an iodoform test?

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${({CH}_{3})}_{2} CH (OH) {CH}_{3}$

C7H14O

$CH (OH) {CH}_{2} {CH}_{3}$

${CH}_{3} {CH}_{2} CH (OH) {CH}_{3}$

answer is B.

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Detailed Solution

2-butanol alcohols does not give an iodoform test.

A yellow precipitate of iodoform is produced because butanol also includes the chemical group ${CH}_{3} CH (OH)$ . Iodoform testing is only performed on ethanol, primary alcohol. Alpha methyl groups are not present in it. The reaction of the provided chemical with NaOH and $ I 2$ does not produce an iodoform.

Hence, option is correct.

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