What is the product formed when chloroform reacts with acetone?

Hypnotics

The correct answer is (2) hypnotics.

The reaction of chloroform with acetone in the presence of a base, such as sodium hydroxide, produces a compound called 1,1,1-trichloro-2-methyl-2-propanol, which is also known as chloral hydrate. Chloral hydrate is a sedative and hypnotic drug that is used to treat insomnia.

The other options are incorrect. Option (1), insecticide, is incorrect because chloral hydrate is not used as an insecticide. Option (3), analgesic, is incorrect because chloral hydrate is not used as an analgesic. Option (4) isocyanide, is incorrect because the reaction of chloroform with acetone does not produce an isocyanide.

Therefore, the only product formed when chloroform reacts with acetone in the presence of a base is chloral hydrate, which is a hypnotic drug.