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A gas is liquefied...

A gas is liquefied

A

Above critical temperature and below critical pressure

B

Below critical temperature and above critical pressure

C

Below critical temperature and pressure

D

Above critical temperature and pressure

Text Solution

Verified by Experts

The correct Answer is:
B
The temperature above which the gas cannot be liquefied is called the critical temperature. The minimum pressure required to liquefy the gas at the critical temperature is called the critical pressure.
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NH_(3) gas is liquefied more easily than N_(2) . Hence

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The gas that liquefies first, when cooled from 500 K to its critical temperature given in parenthesis is "____________" .

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Knowledge Check

  • NH_3 gas is liquefied more easily than N_2 . Hence

    A
    van der Waals constants a and b of `NH_3 gt` that of `N_2`
    B
    van der Waals constants a and b of `NH_3 lt ` that of `N_2`
    C
    `a(NH_3) gt a(N_2) " but " b(NH_3) lt b(N_2)`
    D
    `a(NH_3) lt a(N_2) " but " b(NH_3) gt b(N_2)`

  • The gas that liquefies first, when cooled from 500 K to its critical temperature given in parenthesis is "____________" .

    A
    `NH_(3) ( 405.5K)`
    B
    `CO_(2) ( 304.1K ) `
    C
    `N_(2) ( 126.0 K ) `
    D
    `O_(2) ( 154.3K)`

  • Assertion : Lower the cirtical temperature for a gas, more easily can it is liquefied. Reason : Critical temperature is the temperature above which above which a gas cannot liquefied depending upon the pressure.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion
    B
    If both assertion and reason are correct and reason is not correct explanation for assertion
    C
    If assertion is correct but reason is incorrect
    D
    If assertion and reason are both incorreect.