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Assertion (A) : Three states of matter a...

Assertion (A) : Three states of matter are the result of balance between intermolecular forces and thermal energy of the molecules.
Reason (R ) : Intermolecular forces tend to keep the molecules together but thermal energy of molecules tends to keep them apart.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true but R is not the 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

Both assertion and reason are true and reason is the correct explanation of assertion. Intermolecular forces and thermal energy decides the state of matter as the former kept the molecules together but after some time, it keeps them apart.
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Knowledge Check

  • Intermolecular forces between two benzene molecules are nearly of same strength as those between two toluene molecules. For a mixture of benzene and toluene, which of the following are not true ?

    A
    `Delta_(mix)H=` zero
    B
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    C
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    D
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  • 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.

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    Both A and R are true and R is the correct explanation of A
    B
    Both A and R are true but R is not the correct explanation of A
    C
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    D
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  • Assertion (A) : Liquids tend to have maximum number of molecules at their surface. Reason (R ) : Small liquid drops have spherical shape.

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    Both A and R are true and R is the correct explanation of A
    B
    Both A and R are true but R is not the correct explanation of A
    C
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