Q .     Suppose the elements X and Y combine to form two compounds `XY_2` and `X_3 Y_2`. When 0.1 mole of `XY_2` weighs 10 g and 0.05 mole of `X_3Y_2` weighs 9 g, the atomic weights of X and Y are :

NEET 2016
A

20, 30

B

30, 20

C

40, 30

D

60, 40

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