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Assertion : At high altitudes , liquids ...

Assertion : At high altitudes , liquids boil at lower temperatures in comparison to that at sea level .
Reason : At high altitudes , atmospheric pressure is low .

A

If both assertion and reason are true and reason is the correct explanation of assertion .

B

If both assertion and reason are true but reason is not the correct explanation of assertion .

C

If assertion is true but reason is false .

D

If both assertion and reason are false .

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Boiling Point**: - The boiling point of a liquid is defined as the temperature at which its vapor pressure equals the atmospheric pressure surrounding it. 2. **Assertion Analysis**: - The assertion states that at high altitudes, liquids boil at lower temperatures compared to sea level. This is true because, as altitude increases, the atmospheric pressure decreases. 3. **Reason Analysis**: - The reason provided states that at high altitudes, the atmospheric pressure is low. This is also true, as atmospheric pressure decreases with an increase in altitude. 4. **Connecting Assertion and Reason**: - Since the boiling point is dependent on the atmospheric pressure, a decrease in atmospheric pressure (as stated in the reason) will lead to a decrease in the boiling point of liquids. Therefore, the reason correctly explains the assertion. 5. **Conclusion**: - Both the assertion and reason are true, and the reason is the correct explanation of the assertion. 6. **Final Answer**: - The correct option is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.
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