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Assertion(A): Langmuir adsorption is a s...

Assertion(A): Langmuir adsorption is a single-layer phenomenon.
Reason(R): It is due to van der Waals forces.

A

If both assertion and reason are ture, and reason is the trure explanation of the assertion.

B

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

C

If assertion is true, but reason is false.

D

If both assertion and reason false.

Text Solution

Verified by Experts

The correct Answer is:
C
Correct R. The single layer formed may be due to van der Waals adsorption or chemisorption.
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Assertion :- Langmuir adsorption is a single layer phenomenon. Reason :- It is due to Vanderwaal's forces.

Define van der Waal's radius.

In the van der Waals equation

r_("(van der Waal)") is

Van der waals forces consist of

Van Der Waals Equation

In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): Extent of physisorption of a gas increases with decrease in temperature. Reason (R): It is due to decrease in strength of van der Waals forces.

In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): Extent of physisorption of a gas increases with decrease in temperature. Reason (R): It is due to decrease in strength of van der Waals forces.

For a real gas (van der Waal's gas)

Knowledge Check

  • Assertion :- Langmuir adsorption is a single layer phenomenon. Reason :- It is due to Vanderwaal's forces.

    A
    If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
    B
    If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
    C
    If Assertion is True but the Reason is False.
    D
    If both Assertion & Reason are False.

  • In the van der Waals equation

    A
    `b` is the volume occupied by the gas molecules
    B
    `b` is four times the volume occupied by the gas molecules
    C
    `b` is the correction factor for intermolecular attraction
    D
    None of these

  • r_("(van der Waal)") is

    A
    half the bond length
    B
    twice the bond length
    C
    half of the distance between centres of nuclei of two non-bonded atoms of adjacent molecules in solid state
    D
    None of these