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At absolute zero-...

At absolute zero-

A

only para-hydrogen exists

B

only ortho-hydrogen exists

C

both ortho-and para-hydrogen exist.

D

neither para-nor ortho-hydrogen exists

Text Solution

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The correct Answer is:
A
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According to the theory of specific heats of solids at extremely low temperature (close to absolute zero), the temperature The as S=cT^3 where c is a constant depending on the material of the solid Find the heat energy required to raise the temperature of 0.1 kg of the solid from OK to 4K

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Knowledge Check

  • This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement-I : Enthalpy and entropy of any elementary substance in the standard states are taken as zero. Statement-II : At absolute zero, particles of the perfectly crystalline substance become completely motionless.

    A
    Statement-I is true, Statement-II is true, Statement-II is a correct explanation of Statement-I
    B
    Statement-I is true, Statement-II is true, Statement-II is not a correct explanation of Statement-I
    C
    Statement-I is true, Statement-II is false.
    D
    Statement-I is false, Statement-II is true.

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