Which of the following aqueous solutions will conduct an electric current quite well?

Which of the following is a strong electrolyte?

In a weak electrolytic solution,the degree of ionization:

Ostwald's dilution law gives satisfactory results with:

It has been observed that gaseous hydrogen chloride is a very poor conductor of electricity,but a solution of hydrogen chloride gas in water is a good conductor of electricity. This is due to the fact that:

How much water must be added to $300 \ mL$ of $0.2 \ M$ solution of $CH_3COOH$ $(K_a = 1.8 \times 10^{-5})$ for the degree of ionisation $(\alpha)$ of the acid to double (in $mL$)?