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Which one of the following statement is correct ?

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At 298 K, conductivity of silver is lesser than that of 0.01 M NaCl

At 298 K, in aqueous solution the ion with least limiting molar conductivity is H⁺ ion

Direct current is used in the measurement of resistance of an electrolyte

Poly acetylene when exposed to iodine vapours acquire metallic lustre and conductivity

answer is D.

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Detailed Solution

(1) At 298 K, conductivity of silver (6200 S.m^-1) is higher than that of 0.01 M NaCl (0.12 S.m^-1).

(2) At 298 K, in aqueous solution the ion with highest limiting molar conductivity is H⁺ ion (349.6 mho.cm².mol^-1).

(3) Direct current cannot be used in the measurement of resistance of an electrolyte.

Direct current changes the composition of the electrolyte.

Alternating current is used in the measurement of resistance of an electrolyte.

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