Assertion: At $1 a t m$ , pure water can boil at a temperature less than $273 K$ .
Reason: Water boils when the vapor pressure of the water is equal to the atmospheric pressure.

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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Both Assertion and Reason are correct and Reason is not the correct explanation of Assertion.

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Assertion is correct but Reason is not correct.

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Assertion is not correct but Reason is correct.

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Both the Assertion and Reason are not correct.

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Solution

The correct option is C
Assertion is not correct but Reason is correct.

For boiling of water 1 atm pressure and 273 K temperature is must If the temperature is reduced then pressure must be increased for boiling water at a temperature less than 273 K.

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Assertion: At 1 atm, pure water can boil at a temperature less than 273 K.Reason: Water boils when the vapor pressure of the water is equal to the atmospheric pressure.

The correct option is C Assertion is not correct but Reason is correct. For boiling of water 1 atm pressure and 273 K temperature is must If the temperature is reduced then pressure must be increased for boiling water at a temperature less than 273 K.

Assertion: At $1 a t m$ , pure water can boil at a temperature less than $273 K$ .
Reason: Water boils when the vapor pressure of the water is equal to the atmospheric pressure.

The correct option is C
Assertion is not correct but Reason is correct.

For boiling of water 1 atm pressure and 273 K temperature is must If the temperature is reduced then pressure must be increased for boiling water at a temperature less than 273 K.