Explanation

(d)
Iodoform test is given by compounds which have $CH_{3}CO\ or\ CH_{3}CHOH$ group.
H
|
$(a)H_{3}C - C - CH_{3}\ \ \ \ \ \ \ \ \ \ (b)CH_{3}CH_{2}OH$
| ethyl alcohol
OH
Iso-propyl alcohol
O
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \parallel$
$(c)\ CH_{3} - C - H$
ethanal
[image:10_image60.emf]
(i) $iso$-propyl alcohol, ethanol ad ethanal all have $CH_{3}CO$ or CHOH group, therefore they give iodoform test.
(ii) Benzyl alcohol does not have $CH_{3}CO - or\ CHOH$ group,
|
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}$
Therefore, it does not give iodoform test.