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Q.

The potential energy curve for interaction between two molecules is shown in figure. Which of the following statements are true?

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a

The molecules have maximum attraction for r = OA.

b

The molecules have maximum kinetic energy for r = OB.

c

The intermolecular force is zero for r = OB.

d

For the gaseous state, the depth BD of the potential energy curve is much smaller than KT.

answer is B.

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Detailed Solution

(1) False, it is repulsion here.(2) True, since minimum potential energy means maximum kinetic energy.(3) True, since slope gives force and it is zero here.(4) True, since a well >>KT, would mean molecules staying together.
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