1. Tardigrade
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  3. Chemistry
  4. Water is added to the solution M such that the mole fraction of water in the solution becomes 0.9. The boiling point of this solution is

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Q. Water is added to the solution $M$ such that the mole fraction
of water in the solution becomes $0.9$. The boiling point of this solution is

IIT JEEIIT JEE 2008Solutions

Solution:

Now ethanol is solute.
Molality of solute =$\frac{0.1}{0.9 \times 18} \times 1000 =6.17$
$\Rightarrow \Delta T_b =6.17 \times 0.52 = 3.20 $
$\Rightarrow T_b =373+3.2 =376.2 \,K$