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In each of the following pairs, which will conuct more electricity? `a.` `Cu` wire at `30^(@)C` and `60^(@)C`. `b.` `KBr` solution at `30^(@)C` and `6

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In each of the following pairs, which will conuct more electricity? a. Cu wire at 30∘C and 60∘C . b. KBr solution at 30∘C and 60∘C . c. NH4OH solution at 30∘C and 60∘C . d. M and 0.1M propanioc acid solutions. Select the correct answer from above options

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a. Cu wire at 30∘C will conduct more electricity since conductance in metals is inversely proportional to temperatue. With the increase in temperature, metallic conductance decrease due to the vibration of positive fixed kernals. b. KBr solution at 60∘C , because conductance of a strong electrolyte is directly proportional to the temperature due to the increase in ionic mobilities. c. NH4OH solution at 60∘C , because the conductance of a weak electrolyte is also direactly proportional to temperature due to increase in ionization. d. 0.1M propanoic acid solution , because the conductance of a weak electrolytic is inversely proportional to concentration or directly proportional to dilution due to increase in ionization on dilution.

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