Question

Assertion :The conductance of ions during passage of current through and electrolyte showing autoprotolysis are abnormally higher. Reason: The ions obtained during autoprotolysis show higher values due to Grotthus conductance.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• C. Assertion is correct but Reason is incorrect.
• D. Assertion is incorrect but Reason is correct.

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

Abnormally high values of molar conductivities of $H^{+}$ and $O{H}^{-}$ ions in water is due to Grotthus conductance which is explained on the basis of a proton jump from one water molecule to other.

It is is also noticed for ${N{H}_4}^{+}$ and $N{H}_2^{-}$ as their ionic molar conductivity in liquor $N{H}_3$ is abnormally higher than other cations or anions in liquor $N{H}_3$.

Thus, in these solvents, the charge moves throughout the solution, but the ions do not move that much distance as the ions move only from one solvent molecule to adjacent solvent molecule.

This results in higher conductivity.