Question

Which aqueous solution is the best conductor of an electrical current?

Answer 1

Answer: The correct answer is Option 4.

Explanation:

Electrical conductivity is defined as the degree to which a material can conduct electricity. Electricity is conducted by the free ions that are present in a solution.

Ionic compound on dissociation only forms ions which increases the electrical conductivity. More the concentration of the solution, more ions will be formed and more will be the electrical conductivity of the substance.

From the given options:

KOH is an ionic compound and $CH_3OH$ is a covalent compound.

0.1M KOH has higher concentration that 0.01 M KOH.

Hence, the best conductor out of the given options will be 0.1 M KOH.

Therefore, the correct answer is Option 4.

Answer 2

CH3OH is non-ionic and does not form a conductive solution. 

0.1 M KOH has a higher total ionic concentration than 0.01 M KOH, so it will be a more conductive solution.