Formic acid gives/does not give silver mirror with Tollen's reagent.

Explanation

To determine whether formic acid gives a silver mirror with Tollen's reagent, we need to analyze the properties of formic acid and Tollen's reagent.

### Step 1: Understanding Tollen's Reagent
Tollen's reagent is a solution of silver nitrate (AgNO3) in ammonia (NH3). It is used to test for the presence of aldehydes. When an aldehyde is present, it reduces the silver ions (Ag⁺) in Tollen's reagent to metallic silver (Ag), which forms a silver mirror on the inner surface of the test tube.

**Hint:** Remember that Tollen's reagent specifically reacts with aldehydes and some other reducing agents.

### Step 2: Identifying Formic Acid
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