Home
Class 11
CHEMISTRY
Assertion (A) Gases do not liquefy above...

Assertion (A) Gases do not liquefy above their critical temperature, even on applying high pressure.
Reason (R) Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

A

A and R both are correct, and R is correct explanation of A.

B

A and R both are correct, but R is not correct explanation of A.

C

A is true but R is false.

D

A is false but R is true.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • STATES OF MATTER : GASES, LIQUIDS AND SOLIDS

    CBSE COMPLEMENTARY MATERIAL|Exercise ONE WORD ANSWER TYPE QUESTIONS|10 Videos

  • STATES OF MATTER : GASES, LIQUIDS AND SOLIDS

    CBSE COMPLEMENTARY MATERIAL|Exercise 1-MARK QUESTIONS|15 Videos

  • STATES OF MATTER : GASES, LIQUIDS AND SOLIDS

    CBSE COMPLEMENTARY MATERIAL|Exercise MATCH THE COLUMNS|2 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    CBSE COMPLEMENTARY MATERIAL|Exercise UNIT TEST|12 Videos

  • STRUCTURE OF ATOM

    CBSE COMPLEMENTARY MATERIAL|Exercise UNIT TEST|8 Videos

Similar Questions

Explore conceptually related problems

Why are the gases helium and hydrogen not liquefied at room temperature by applying very high pressure ?

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.

Assertion: SO_(2) gas is easily liquefied while H_(2) is not. Reason: SO_(2) has low critical temperature while H_(2) has high critical temperature.

Assertion : Viscosity of liquids decreases as the temperature rises. Reason : At high temperature molecules have high kinetic energy and can overcome the intermolecular forces to flow faster.

Real gases approches ideal gas at high temperature and low pressure because A) interatomic separation is large size of the molecule is negligible when compareed to inter atomic separation

Assertion: Gases like N_(2), O_(2) behave as ideal gases at high temperature and low pressure. Reason: Molecular interaction diminihes at high temperature and low pressure.

Knowledge Check

  • Assertion : All the gases should be cooled below their critical temperature for liquification . Reason : Cooling slows down the movement of molecules therefore , intermolecular forces may hold the slowly moving molecules together and the gas liquifies .

    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 .

  • 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.

  • Assertion : Lower the critical temperature of the gas, more easily can it be liquefied. Reason : Critical temperature is the temperature above which a gas can not be liquefied depending upon the pressure.

    A
    A and R both are correct, and R is correct explanation of A.
    B
    A and R both are correct, but R is not correct explanation of A.
    C
    A is true but R is false.
    D
    A is false but R is true.