Question

By adding common salt to distilled water makes it

• A. Good conductor.
• B. Insulator.
• C. Semiconductor.
• D. None of these.

Answer 1

The correct option is A

Good conductor.

The explanation for the correct option.

1. Common salt is an electrolyte.
2. It splits up to form ions when dissolved in water, when these ions move, they conduct electricity.
3. When common salt is dissolved in water it gets splits up into ions and conducts electricity.
4. Therefore, it makes water a good conductor.

$$\begin{gathered} \mathrm{NaCl}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{aq}\right)\rightleftharpoons {\mathrm{Na}}^{+}\left(\mathrm{aq}\right)+{\mathrm{Cl}}^{-}\left(\mathrm{aq}\right) \\ \mathrm{Sodium}\mathrm{water}\mathrm{Sodium}\mathrm{Chlorine} \\ \mathrm{Chloride}\mathrm{Ion}\mathrm{Ion} \end{gathered}$$

The explanation for the incorrect option.

1. The presence of common salt makes the water a good conductor.
2. Therefore insulators and semiconductors are the wrong options.

Hence option (A) is correct.