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Assertion : Gases become denser at high ...

Assertion : Gases become denser at high pressure.
Reason : At high pressures, real gases deviate from Boyle's law.

A

If both (A) and (R) are correct and (R) is the correct explanation of (A).

B

If both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C

If (A) is correct, but (R) is incorrect.

D

If both (A) and (R) are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
B
When a given mass of a gas is compressed, the same number of molecules occupy a smaller space. Hence, gases become denser at high pressure.
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Knowledge Check

  • Assertion : Compressibility factor (Z) is the ratio of actual molar volume of the gas to the molar volume it, if it were an ideal gas at that temperature and pressure. Reason : At high pressure all the gases have Z lt 1 and can be easily compressed.

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    If both (A) and (R) are correct and (R) is the correct explanation of (A).
    B
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    C
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  • Assertion : At high pressure, the compresibility factor Z is (1+(Pb)/(RT)) . Reason : At high pressure, van der Waals equation is modified as P(V-b)=RT .

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    If both (A) and (R) are correct and (R) is the correct explanation of (A).
    B
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  • Assertion: The decomposition of gaseous ammonia on a hot platinum surface is a zero order reaction at high pressure. Reason: For a zero order reaction, the rate of reaction is independent of initial concentration.

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    B
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    C
    If (A) is correct, but (R) is incorrect.
    D
    If both (A) and (R) are incorrect.

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