Identify(A) based on following facts :
a. `A` reduces `HgCl_(2)` solution to white ppt. charging to grey .
b. (A) turns ` FeCl_3` yellow colured solution to green .
c. (A) give white ppt, with `NaOH` soluble in excess of `NaOH` .
d. (A) gives yellow dirty ppt. on passing `H_2S` gas , soluble in yellow ammonium sulphjde (YAS).
e. (A) gives chromyl chloride test .

Explanation

To identify the compound \( A \) based on the given facts, we will analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement:** \( A \) reduces \( HgCl_2 \) solution to a white precipitate changing to gray.

**Explanation:** When \( A \) (which we suspect to be a tin compound) reacts with \( HgCl_2 \), it forms \( Hg_2Cl_2 \) (mercurous chloride), which is a white precipitate that can turn gray upon further reaction. This indicates that \( A \) is likely to be a reducing agent.

### Step 2: Analyze the second statement
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