Question

Assertion:Molar conductivity increases with decrease in concentration.
Reason:Conductivity always decrease with decrease in concentration.
A. If both assertion and reason are true and reason is the correct explanation of assertion .
B. If both assertion and reason are true but reason is not the correct explanation of assertion .
C. If assertion is true but reason is false .
D. If both assertion and reason are false .

Answer 1

Correct Answer - B
`lambda_m=KV`
With decrease in concentration , total volume V of the solution containing one mole of electrolyte also increases and decreases in K (conductivity) on dilution of a solution is more than compensated by increase in its volume, hence molar conductivity `(lambda_m)` increases.