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A solution prepared by dissolving 15 g o...

A solution prepared by dissolving 15 g of non-volatile solute in 270 g of water gave relative lowering of vapour pressure of 0.005. The molecular weight of the solute is

A

324

B

200

C

225

D

20

Text Solution

Verified by Experts

The correct Answer is:
B
`M_(2) = (W_2M_1)/(W_1) xx ((p^@)/(p^@ -p_s))` where, symbols have their usual meaning , `M_(2) = (15 xx 18)/(270) xx (1)/(0.005) =200`
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