Molal elevation constant of water is 0.52 K.Kg/mole. If the boiling point of 1M Sodium chloride solution is 374.04 K then the degree of ionization of sodium chloride will be

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0.5

0.75

0.6

answer is A.

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Detailed Solution

∆Tb=iKbm; ∆Tb=374.04K-373K=1.04K; 1.04=i0.521; i=2; For NaCl, n=2, i=1-α+nα; 2=1-α+2α; α=1;

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