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Figure explains elevation in boiling poi...

Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperaure and elevation in boiling point is marked.

Ratio of `DeltaT_(b)//K_(b)` of `6% AB_(2)` and `9% A_(2)B (AB_(2)` and `A_(2)B` both are non-electrolytes) is 1 mol/kg in both cases. Hence, atomic masses of A and B are respectively.

A

60,90

B

40,40

C

40,10

D

10,40

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The correct Answer is:
C
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Ratio of DeltaT_(b)//K_(b) for 6% AB_(2) "and" 9% A_(2)B (AB_(2) "and" A_(2)B both are non-electrolytes ) is 1 mol/kg in both cases. Hence , atomic masses of A and B are respectively :

Ratio of DeltaT_(b)//K_(b) of 6% AB_(2) and 9% A_(2)BAB_(2) and A_(2)B both are non-electrolytes is 1 mol/kg in both cases. Hence atomic masses of A and B are respetively.

Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperaure and elevation in boiling point is marked. Elevation in b.p of an aqueous urea solution is 0.52^(@) (K_(b) = 0.52^(@) mol^(-1)kg) . Hence, mole fraction of urea in this solution is:

Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperaure and elevation in boiling point is marked. Given that DeltaT_(b) is the elevation in boiling point of the solvent in a solution of molarity m then lim_(m rarr 0) ((Delta T_(b))/(m)) is equal to:

Ratio of (DeltaT_(b))/(K_(b)) of 10 g AB_(2) and 14g A_(2)B per 100 g of solvent in their respective, solution ( AB_(2) and A_(2)B both are non-electrolytes) is 1 mol/kg in both cases. Hence, atomic wt. of A and B are respectively.

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