1.

In each of the following pairs, which will allow greater conduction of electricity and why? (a) Silver wire at 20^(@)C, Same silver wire at 50^(@)C (b) NaCl solution at 20^(@)C, same NaCl solution at 50^(@)C (c) NH_(4)OH solution at 20^(@)C, Sae NH_(4)OH solutio at 50^(@)C (d) 0.1M acetic acid solution, 1M acetic acid solution.

Answer»

Solution :(a) Silver wire at `20^(@)C` because with increase in temperature, metallic conduction decreases due to vibration of kernels.
(b) NaCl solution at `50^(@)C` because in case of a strong electrolyte with increase in temperature, the IONIC MOBILITIES increase.
(c) `NH_(4)OH` at `50^(@)C` because in case of a weak electrolyte, DISSOCIATION increases with increase in temperature.
(d). 0.1 M acetic acid because with dilution, dissociation/ionization increases.


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