Statement : I The increase in molar conductance with dilution is more in HCl than in HCOOH
Statement : II On dilution the degree of dissociation of strong electrolyte increases while that of weak electrolyte decreases

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If both statements, I and II, are correct.

If statement I incorrect, but statement II is correct.

If both statements, I and statement II, are incorrect.

If statement I correct, but statement II is incorrect.

answer is B.

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Detailed Solution

Molar conductance of strong electrolytes increases due to

(1) Strong electrolytes are almost completely dissociated in moderate concentrations.

(2) number of ions in the total volume of the solution containing one mole of electrolyte remains same

(3) velocity of conducting ions increases

Molar conductance of weak electrolytes increases due to

(1) increase in degree of dissociation of weak electrolyte

(2) increase in number of ions in the total volume of the solution containing one mole of electrolyte.

on dilution increase in molar conductivity of weak electrolyte is greater than increase in molar conductivity of strong electrolytes

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