Which of the followig gives silver mirror test?

Options

A. HCOOH
B. `CH_(3)COCHOHCH_(3)`
C. Tartaric acid
D. Glucose

Explanation

To determine which compound gives a silver mirror test, we need to understand the conditions under which this test is positive. The silver mirror test, also known as the Tollens' test, is primarily used to identify aldehydes and certain alpha-hydroxy ketones.

### Step-by-Step Solution:

1. **Understanding the Silver Mirror Test**:
- The silver mirror test is performed using Tollens' reagent, which contains silver ions (Ag+).
- Aldehydes can reduce Ag+ to metallic silver, which deposits on the walls of the test tube, creating a silver mirror effect.

2. **Identifying Aldehydes**:
- Aldehydes have the general structure RCHO, where R can be a hydrogen or a hydrocarbon group.
- When an aldehyde is present, it will oxidize to a carboxylic acid and reduce the silver ions, leading to the formation of a silver mirror.

3. **Identifying Alpha-Hydroxy Ketones**:
- Some alpha-hydroxy ketones can also give a positive silver mirror test.
- These compounds have a hydroxyl group (-OH) adjacent to the carbonyl group (C=O).

4. **Examples of Compounds**:
- Formic acid (HCOOH) is an exception as it is a carboxylic acid but can also give a positive test due to its ability to oxidize to carbon dioxide and hydrogen.
- Tartaric acid and glucose are examples of compounds that can give a silver mirror test because they contain aldehyde functional groups or are alpha-hydroxy ketones.

5. **Conclusion**:
- To answer the question, we need to identify the specific compounds provided in the options.
- If any of the options are aldehydes or alpha-hydroxy ketones, they will give a positive silver mirror test.