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Assertion Molar conductance of an electr...

Assertion Molar conductance of an electrolyte increases with dilution
Reason Ions move fast in dilute solutions.

A

If both assertion and reason are true, and reason is the true explanation of the assertion

B

if both assertion and reason are true, but reason is not the true explanation of the assertion.

C

if assertion is true, but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Correct explanation. Molar conductance increases because with dilution in a weak electrolyte, dissociation increases while in a strong electrolyte, interionic attraction decreases.
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Knowledge Check

  • Assertion : Molar conductance of an electrolyte increases upon dilution. Reason : Ions move faster in dilute solution.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion.
    B
    If both assertion and reason are correct but reason is not correct explanation for assertion.
    C
    If assertion is correct but reason is incorrect.
    D
    If assertion and reason both are incorrect.

  • As the dilution of an electrolyte increases

    A
    Sepcific conductance decreases
    B
    Molar conductance decreases
    C
    Resistance increases
    D
    No change takes place in conductance

  • Equivalent conductance of a week electrolyte increases on dilution because of

    A
    increase in number of ions per unit volume
    B
    increase in molecular attraction
    C
    increases in degree of association
    D
    increases in degree of ionisation of the substance

    • Similar Questions

    Explore conceptually related problems

    Statement-1: Molar conductance of any electrolyte increases with dilution. Statement-2: With dilution number of ions per mL of the solution decreases.

    Assertion. Degree of ionization of weak electrolyte increases with dilution. Reason. Degree of ionization is inversely proportional to molar concentration.

    Assertion : Conductivity of all electrolytes decreases on dilution. Reason : On dilution number of ions per unit volume decreases.

    Assertion : The molar conductance of weak electrolytes at infinite dilution is equal to sum of the molar conductances of cation and anion. Reason : Kohlrausch's law is applicable to both strong and weak electrolytes.

    The conductivity of an electrolytic solution decreases on dilution due to

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