Q.

Elevation in boiling point was 0.52oC when 6 gm of a compound X was dissolved in 100 gm of water. Molecular weight of X is: ( Kb for water is 0.52 per 1000 gm of water)

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a

180

b

120

c

60

d

600

answer is B.

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Detailed Solution

ΔTb=100×Kb×Wm×W0.52=100×5.2×6m×100 m=100×5.2×60.52×100=60

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