Question

How will you distinguish between pentan-2-one and pentan-3-one with the help of iodoform test?

Answer 1

pentan-2-one  will give positive iodoform test

Explanation:

pentan-2-one has an C0 - CH₃ and the end , thus it is an methyl ketone , it will give iodoform test , ie yellow ppt will be seen .

pentan-3-one on the other hand will not give yellow ppt with iodoformtest .

the groups in the image below   only  gives the test .