A solution containing 2   g of a non-volatile solute in 20   g of water boils at 373 . 52   K…

A solution containing 2 g of a non-volatile solute in 20 g of water boils at 373.52 K. The molecular mass of the solute is _____ gmol-1. (Nearest integer)

Given, water boils at 373 K,Kb for water =0.52K kg mol-1

Solution

Elevation in boiling point:
ΔTb=373.52-373=0.52

ΔTb=Kb·m

0.52=0.52×2 Molar Mass of Solute ×120×10-3

Molar Mass of solute=100 g/mol

Asked in: JEE Main 2023 (30 Jan Shift 1)

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