Q.

The conductivity of 0.01 M solution of sodium hydroxide is 2.48 × 10-3 S cm-1. The molar conductivity of sodium hydroxide at 0.01 M concentration is

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a

0.248 S cm2 mol-1

b

4.03 Ω-1 cm-2 mol-1

c

4.03 × 10-3 S-1 cm2 mol-1

d

248.0 S  cm2 mol-1

answer is D.

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Detailed Solution

Λm=κ/c=2.48×10−3Ω−1cm−1/0.01×10−3mol cm3=248Scm2mol−1
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The conductivity of 0.01 M solution of sodium hydroxide is 2.48 × 10-3 S cm-1. The molar conductivity of sodium hydroxide at 0.01 M concentration is