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12 g of urea is dissolved in 1 litre os ...

12 g of urea is dissolved in 1 litre os water and 68.4 g of sucrese in also dissolven in 1 lite of water. The lowering in the vapour pressure of first case is :

A

equal to secound

B

greater than second

C

less than secound

D

double than second.

Text Solution

Verified by Experts

The correct Answer is:
a
Both have same lowering in V.P. as they have same no. of moles.
`"Urea=((12g))/((60g mol^(-1)))=0.2 mol`
`"Sucrose"=(68.4 g)/((342g mol^(-1)))=0.2 mol`
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