Statement-1 :Acidified `K_(2)Cr_(2)O_(7)` solution becomes green when `SO_(2)` gas is passed through it.
Statement-2 :This is an redox reaction.

Options

A. STATEMENT-1 is true, STATEMENT-2 is true and STATEMENT-2 is correct explanation for STATEMENT-1
B. STATEMENT-1 is true, STATEMENT-2 is true and STATEMENT-2 is not correct explanation for STATEMENT-1
C. STATEMENT-1 is true, STATEMENT-2 is false
D. STATEMENT-1 is false, STATEMENT-2 is true

Answer

To analyze the statements provided in the question, let's break down the information step by step.

### Step 1: Understanding the Reaction
We start with acidified potassium dichromate, \( K_2Cr_2O_7 \), which is orange in color. When sulfur dioxide (\( SO_2 \)) gas is passed through this solution, a chemical reaction occurs.

### Step 2: Writing the Balanced Chemical Equation
The reaction can be represented as follows:
\[ K_2Cr_2O_7 + 3SO_2 + 4H_2SO_4 \rightarrow 2Cr_2(SO_4)_3 + K_2SO_4 + 4H_2O \]
In this reaction, potassium dichromate reacts with sulfur dioxide in the presence of sulfuric acid.

### Step 3: Identifying the Oxidation States
- In \( K_2Cr_2O_7 \), the oxidation state of chromium (Cr) is +6.
- In \( Cr_2(SO_4)_3 \), the oxidation state of chromium is +3.
- For sulfur in \( SO_2 \), it is +4, and in \( K_2SO_4 \), it is +6.

### Step 4: Analyzing the Changes in Oxidation States
- Chromium is reduced from +6 to +3, indicating a reduction process.
- Sulfur is oxidized from +4 to +6, indicating an oxidation process.
This confirms that the reaction is indeed a redox reaction.

### Step 5: Observing the Color Change
The color change from orange (due to \( K_2Cr_2O_7 \)) to green (due to \( Cr_2(SO_4)_3 \)) occurs because of the change in the oxidation state of chromium.

### Conclusion
- **Statement 1**: Acidified \( K_2Cr_2O_7 \) solution becomes green when \( SO_2 \) gas is passed through it. **(True)**
- **Statement 2**: This is a redox reaction. **(True)**

Both statements are correct, but Statement 2 does not explain Statement 1. The color change is due to the formation of chromium sulfate, not merely because it is a redox reaction.

### Final Answer
Both statements are true, but Statement 2 is not the correct explanation for Statement 1.

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