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Equivalent, Molar Conductivity and Cell Constant

Electrolytes ...

Question

Electrolytes which have low value of equivalent conductance at high concentrations are termed as strong electrolytes.

A

True

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B

False

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Solution

The correct option is A True

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Assertion A: The molar conductance of weak electrolytes is low as compared to that of strong electrolytes at moderate concentrations.

Reason R: Weak electrolytes at moderate concentrations dissociate to a much greater extent as compared to strong electrolytes.

Q. The substances which at low concentrations behave as normal strong electrolytes, but at higher concentrations exhibit colloidal behaviour are known as

Q. For a strong electrolyte, equivalent conductance increases slowly with dilution and can be expressed by the relationship :

Λ_{m} = Λ_{m}^{\circ} - A \sqrt{c}

. Which electrolyte(s) have same value of A ?

Q. Assertion :Equivalent conductance of all electrolytes decreases with increasing concentration. Reason: Lesser number of ions are available per gram equivalent at higher concentration.

Assertion: At infinite dilution, both strong and weak electrolyte have degree of ionization equal to unity.

Reason: At infinite dilution of an electrolyte, the equivalent conductance of cations and anions are independent of each other.

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