This section contains Assertion and Reason type question. Each question has 4 choices (1),(2), (3) and (4), out of which only one is correct.
Assertion (A) Acid rain has pH below 5.6.
Reason (R ) Acid-rain is due to depletion of ozone layer.

Options

A. Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect

Answer

To solve the assertion and reason question, let's analyze both statements step by step.

### Step 1: Analyze the Assertion
**Assertion (A): Acid rain has pH below 5.6.**

- Normal rainwater has a pH of about 5.6 due to the presence of dissolved carbon dioxide, which forms carbonic acid.
- Acid rain, however, is caused by the presence of stronger acids like sulfuric acid (H₂SO₄) and nitric acid (HNO₃) in the atmosphere.
- The pH of acid rain is typically around 4 or lower, which confirms that the assertion is true.

### Step 2: Analyze the Reason
**Reason (R): Acid rain is due to depletion of ozone layer.**

- The depletion of the ozone layer primarily leads to increased ultraviolet (UV) radiation reaching the Earth's surface, which can have various environmental impacts.
- Acid rain is primarily caused by the emission of sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) from industrial processes and vehicles, which react with water vapor in the atmosphere to form sulfuric and nitric acids.
- Therefore, the reason provided is incorrect as it does not accurately describe the cause of acid rain.

### Conclusion
- The assertion is true, but the reason is false. Therefore, the correct answer is that the assertion is true and the reason is false.

### Final Answer
The correct choice is (1): Assertion is true, Reason is false.

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