Which of the following substances,when dissolved in water,will give a solution that does not conduct electricity?

The ionisation constant of a weak acid $(HA)$ in terms of molar conductivity at infinite dilution $(\Lambda _m^\infty)$ and molar conductivity at concentration $C$ $(\Lambda _m)$ is given by:

$HCN$ is $1 \%$ ionized in its $0.2 \ M$ aqueous solution. At the same temperature,what would be its percent ionization in its $0.02 \ M$ aqueous solution?

$A$ weak monobasic acid is $1\%$ ionised in $0.1 \ M$ solution at $25 \ ^{\circ}C$. The $\%$ ionisation in its $0.025 \ M$ solution is

In aqueous solution,strong electrolytes

The degree of dissociation in a weak electrolyte increases