Assertion :The product of magnetic susceptibility and absolute temperature for a paramagnetic substance is constant. Reason: Susceptibility is positive but very small for paramagnetic substance.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion The susceptibility of a paramagnetic substance is inversely proportional to absolute temperature. χ∝1T Hence χT=constant Also for paramagnetic substances the susceptibility is positive and very small.