A: Pure silver is obtained by electrolysis of `AgNO_3` solution
R: In electrolysis impure silver is taken as cathode and pure silver is taken as anode.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false, then mark
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To analyze the given statements, we will break down the assertion and reason step by step.

### Step 1: Understanding the Assertion
- **Assertion (A)**: Pure silver is obtained by electrolysis of AgNO₃ solution.
- **Explanation**: This statement is true. Electrolysis of silver nitrate (AgNO₃) solution is a common method to obtain pure silver. During electrolysis, silver ions (Ag⁺) are reduced at the cathode to form pure silver metal.

### Step 2: Understanding the Reason
- **Reason (R)**: In electrolysis, impure silver is taken as cathode and pure silver is taken as anode.
- **Explanation**: This statement is false. In the process of electrolytic refining, the impure silver is used as the anode, while the pure silver is used as the cathode. The pure silver is deposited at the cathode from the electrolyte, while the impure silver dissolves into the solution at the anode.

### Step 3: Conclusion
- Since the assertion is true and the reason is false, we conclude that the correct relationship between A and R is that A is true, but R is false.

### Final Answer
- The assertion is true, but the reason is false. The correct answer is option 3.

---