Question

Assertion :On increasing dilution, the specific conductance keep on increasing. Reason: On increasing dilution, degree of ionization of weak electrolyte increases and mobility of ions also increases.

• 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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

$\text{Solution}:$

$K=G\sigma$

On dilution G decreases K decreases.

Distance between cation and anion increases force of attraction between cation and anion decreases.

On dilution degree of ionisation increases.

No of ions increases

Mobility of ions increases

$\text{Hence B is the correct option}$