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Question
Ratio of 
of 10g AB2 and 14g A2B per 100g of solvent in their respective, solution (AB2 and A2B both are non-electrolytes) is 1 mol/kg in both cases. Hence, atomic wt. of A and B are respectively:-
of 10g AB2 and 14g A2B per 100g of solvent in their respective, solution (AB2 and A2B both are non-electrolytes) is 1 mol/kg in both cases. Hence, atomic wt. of A and B are respectively:-Options
A.100, 40
B.60, 20
C.20, 60
D.None of these
Solution
ᐃTb = Kb
× 1000
1 =
⇒ MAB2 = 100
similarly MAB2 = 140
100 = MA + 2.MB
and 140 = 2.MA + MB ;
MA = 60 and MB = 20
× 10001 =
⇒ MAB2 = 100similarly MAB2 = 140
100 = MA + 2.MB
and 140 = 2.MA + MB ;
MA = 60 and MB = 20
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