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The vapour pressure of benzene at 80^(@)...

The vapour pressure of benzene at `80^(@)C` is lowered by 10mm by dissoving 2gof a non-volatile substance in 78g of benzene The vapour pressure of benzene at `80^@C` is 750 mm. The molecular weight of the substance will be:

A

15

B

150

C

1500

D

148

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The correct Answer is:
D
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