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Question

Specific conductance of 0.1 M nitric acid is 6.3×102 ohm1 cm1. The molar conductance of solution is

A

630 ohm1cm2 mol1

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B

315 ohm1 cm2 mol1

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C

100 ohm1 cm2 mol1

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D

1201 ohm1 cm2 mol1

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Solution

The correct option is A

630 ohm1cm2 mol1


Molar concentration, (C)=0.1 M
Conductivity, κ=6.3×102 ohm1 cm1
Molar conductance, Λm=KC
Also, we know
1L=1000 cm3
1L1=103 cm3
Molar concentration, (C)=0.1 mol L1
Molar concentration, (C)=0.1×103 mol cm3

Molar conductance, Λm=6.3×1020.1×103
Molar conductance, Λm=6.3×102 ohm1 cm2 mol1

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