Assertion (A): The boiling point of water decreases as the altitude increases. Reason (R): The atmospheric pre

Question

Assertion (A): The boiling point of water decreases as the altitude increases. Reason (R): The atmospheric pressure increases with altitude.

Accepted Answer

The correct answer is C because Assertion A is true but Reason R is false.

The boiling point of a liquid is the temperature at which its vapor pressure equals the surrounding atmospheric pressure. As altitude increases, the air becomes thinner, which means the atmospheric pressure actually decreases, not increases. Because there is less pressure pushing down on the surface of the water, the water molecules can escape into the air as vapor at a lower temperature. Therefore, the boiling point of water decreases as you go higher. Since Reason R incorrectly states that atmospheric pressure increases with altitude, it is a false statement.

Answer

Both A and R are individually true and R is the correct explanation of A

Answer

Both A and R are individually true but R is NOT a correct explanation of A

Answer

A is true but R is false

Answer

A is false but R is true

Assertion (A): The boiling point of water decreases as the altitude increases. Reason (R): The atmospheric pressure increases with altitude.

Explanation

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