(D) Specific conductance (conductivity,$\kappa$) is defined as the conductance of $1 \ cm^3$ of the solution.On increasing dilution,the number of ions

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If both the Assertion and Reason are incorrect.

(D) Specific conductance (conductivity,$\kappa$) is defined as the conductance of $1 \ cm^3$ of the solution.On increasing dilution,the number of ions per unit volume decreases,which leads to a decrease in specific conductance.Therefore,the Assertion is incorrect.Although the degree of ionization and ionic mobility increase with dilution,the Assertion itself is false,making the correct choice $D$.

Class 12 Chemistry Electrochemistry Conductor and Conductance and Cell constant

Medium

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

AIIMS 2015 All AIIMS

AIIMS 2016 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.