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  4. The rise in boiling point of a solution containing 1.8 g of glucose in 100 g of solvent is 0.1° C. The molal elevation constant of the liquid is

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Q. The rise in boiling point of a solution containing $1.8 \,g$ of glucose in $100 \,g$ of solvent is $0.1^{\circ} C$. The molal elevation constant of the liquid is

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Solution:

$\Delta T _{ b }= K _{ b } . m . i $
$\Rightarrow 0.1= K _{ b } \times \frac{1.8}{180} \times \frac{1000}{100} \times 1$
$K _{ b }=1$