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Ratio of DeltaT(b)//K(b) for 6% AB(2) "a...

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 :

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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