Assertion :The conductivity of electrolytic solutions increases with increase of temperature. Reason: Electronic conductance decreases with increase of temperature.
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 As the temperature increases electrolytic conductivityalso increases because with the increase in temperature ionisation increasesand also the movement of ions.
Increasing temperature increase resistance to heat transfer which intern reduce thermal conductivity. In metals, thermal conductivity decreases with increase in temperature. Metals have abundance of free electrons and they have considerable lattice vibrations, so in normal condition they conduct smoothly.