Question

Which of the following statements regarding the haloform test is NOT correct?

• A. Ethanol exhibits this test.
• B. It is given by acetaldehyde.
• C. It is given by compounds containing methyl ketone group.
• D. It is given by benzaldehyde.

Hint:

The haloform test needs a methyl ketone group or a group that oxidises to it.

Answer 1

The Correct Option is D

Step 1: Test the statements
Options (A), (B) and (C) are true: ethanol, acetaldehyde and methyl ketones all give a positive test.

Step 2: Find the false one
Benzaldehyde lacks the $\text{CH}_3\text{CO}-$ unit.

Step 3: Conclusion
So option (D) is the incorrect statement.

Final Answer:
Benzaldehyde has no methyl ketone unit and so does not give the haloform test. \[ \boxed{\text{(D) }\text{It is given by benzaldehyde.}} \]