Which of the following will give yellow precipitate with KOI?

Options

A. a.Cyclopentyl methyl carbinol
B. b.`alpha`-Phenyl ethanol
C. c.`A AE`
D. d.`I_(3)C-CHO`

Answer

A, B, D

Explanation

Methanol is also called carbinol.
a.
b. `Moverset(beta)(e)-underset(Ph)underset(|)overset(alpha)(CH)-OH` (It also contains `(Me-underset(OH)underset(|)(CH)-)` group and gives the iodoform test.)
c. Although `A AE` (acetoacetic easter)

contains `(Me-overset(O)overset(||)(C )-)` group, due to its existence in enolic form

it does not give the iodoform test.
d. `(I_(3)C-CHO)`, this is one of the intermediate products formed in the iodoform reaction, so it gives iodoform test.

So the answers are `(a)`, `(b)`, and `(d)`.