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Q.

Choose the wrong statement

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a

 Electrical conductance of a metallic conductor increases with increase in temperature.

b

 Degree of dissociation of an electrolyte increases with dilution.

c

Electrical conductance of an electrolytic conductor increases with increase in temperature.

d

Electrical conductance of a metallic conductor decreases with increase in temperature.

answer is B.

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Detailed Solution

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In metals, conductivity is due to movement of free electrons. When temperature increases, the vibration of metal ions increases, which results in increase in resistance of metal and hence, decrease in conductivity. 

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