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.

Explanation

(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.