What is the Silver Mirror test?

The Silver Mirror test is Tollens' test. A compound gives this test if it can reduce Tollens' reagent, $[Ag(NH_3)_2]^+$, to metallic silver.

The general reaction is: $RCHO + 2[Ag(NH_3)_2]^+ + 3OH^- \rightarrow RCOO^- + 2Ag \downarrow + 4NH_3 + 2H_2O$

So, aldehydes generally give the silver mirror test, while ordinary ketones do not.

Check each option independently

A: Acetone

Acetone is a ketone: $CH_3COCH_3$ Ordinary ketones do not reduce Tollens' reagent.

Therefore, A is incorrect.

B: Formaldehyde

Formaldehyde is an aldehyde: $HCHO$ Aldehydes give Tollens' test.

Therefore, B is correct.

C: Benzophenone

Benzophenone is a ketone: $(C_6H_5)_2CO$ It does not give Tollens' test.

Therefore, C is incorrect.

D: Acetaldehyde

Acetaldehyde is an aldehyde: $CH_3CHO$ Aldehydes give Tollens' test.

Therefore, D is correct.

Final derived answer

The compounds that give the Silver Mirror test are: $\boxed{\text{B and D}}$

Comparison with stored correct answer

Stored correct answer: D, B

My derived answer: B, D

These are the same set of correct options, just written in different order.