During electrolysis of water, which of the following can be added to increase its conductivity ?A Sugar B Vegetable Oil C H2SO4 D Kerosene

The correct answer is C, H2SO4 (sulfuric acid).

Here's why:

1. Electrolysis of water involves the decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) due to an electric current being passed through the water.

2. The conductivity of water for electrolysis is increased by adding an electrolyte. An electrolyte is a substance that produces an electrically conducting solution when dissolved in water.

3. Sugar and vegetable oil do not dissociate into ions when dissolved in water, so they cannot increase the water's conductivity. Kerosene is a hydrocarbon and is not soluble in water, so it also cannot increase the water's conductivity.

4. Sulfuric acid (H2SO4), on the other hand, is a strong acid and a good electrolyte. When it's added to water, it ionizes completely and increases the concentration of ions in the solution. This increases the solution's ability to conduct electricity, which is why it can be added to water to increase its conductivity during electrolysis.