Question

To differentiate between pentan-$2$-one and pentan-$3$-one a test is carried out. Which of the following is the correct answer?

• A. Pentan-$2$-one will give silver mirror test
• B. Pentan-$2$-one will give iodoform test
• C. Pentan-$3$-one will give iodoform test
• D. None of these

Answer 1

Answer: (B)

Pentan-$2$-one will give iodoform test

Answer 2

Only methyl ketone group gives positive iodoform so compound pentan-$2$-one will give iodoform test and pentan-$3$-one will not give. silver mirror is only valid for aldehyde group, not for ketone.