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Q.
Which of the following does not answer iodoform test?
Aldehydes Ketones and Carboxylic Acids
Solution:
Iodoform test is given by the compounds containing $CH _{3} CO -$ group or $CH _{3} CHOH$ group.
$n$ butyl alcohol $\left( CH _{3} CH _{2} CH _{2} CH _{2} OH \right)$ does not give iodoform test because it does not possess the $CH _{3} CO -$ or $CH _{3} CHOH$ group.