Statement-1 : Washing soda `(Na_2CO_3)` is use to remove temporary hardness.
Statement-2 : Clark's method is used to remove temporary hardness.

Options

A. If both the statements are True and statement-2 is the correct explanation of statement-1
B. If both the statements are True and statement-2 is not the correct explanation of statement-1
C. If statement-1 is true and statement-2 is false
D. If statement-1 is false and statement-2 is true

Answer

To solve the question regarding the statements about washing soda and Clark's method, let's analyze each statement step by step.

### Step 1: Analyze Statement 1
**Statement 1**: Washing soda `(Na2CO3)` is used to remove temporary hardness.

- **Explanation**: Temporary hardness in water is primarily due to the presence of dissolved bicarbonates of calcium and magnesium. When washing soda (sodium carbonate) is added to hard water, it reacts with these bicarbonates to form insoluble carbonates (calcium carbonate and magnesium carbonate), which precipitate out of the solution. This process effectively removes the hardness from the water.

### Step 2: Analyze Statement 2
**Statement 2**: Clark's method is used to remove temporary hardness.

- **Explanation**: Clark's method involves the addition of slaked lime (calcium hydroxide) to hard water. This method works by converting the bicarbonate ions into insoluble carbonate ions, which precipitate out as calcium carbonate. This method is specifically designed to address temporary hardness, which is caused by bicarbonates.

### Step 3: Determine the Relationship Between the Statements
- Both statements are true. Washing soda does indeed remove temporary hardness by precipitating calcium and magnesium ions as insoluble carbonates.
- Clark's method is also a valid method for removing temporary hardness, but it does not directly explain the role of washing soda.

### Conclusion
- Since both statements are true but Statement 2 does not serve as a correct explanation for Statement 1, the correct option is:
**Option B**: Both statements are true and Statement 2 is not a correct explanation of Statement 1.

### Final Answer
**Option B**: Both statements are true and Statement 2 is not a correct explanation of Statement 1.

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