Question

Iodoform can be prepared in the laboratory by the action of iodine on sodium hydroxide solution having :

• A. ethanol
• B. ether
• C. acetamide
• D. acetic acid

Answer 1

The correct option is A ethanol

All alcohols containing the group-

$C{H}_3\stackrel{\stackrel{OH}{|}}{CH-}$
linked to C or H atom that is methyl carbinols gives iodoform test(yellow ppt) when treated with $NaOH$ or $N{a}_{2}C{O}_3$​ and $I_2$​ at 333−343K.

$C_2{H}_{5}OH+4I_2+6NaOH\stackrel{\Delta }{\to }\underset{Iodoform}{CH{I}_3}+HCOONa+5NaI+5H_{2}O$

thus, the correct answer is A.