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18g of glucose (C(6)H(12)O(6))is added t...

`18`g of glucose `(C_(6)H_(12)O_(6))`is added to `178.2` g of water. The vapour pressure of water for this aqueous solution at `100^@C`is :

A

`76.0`

B

`752.4`

C

`759.0`

D

`7.6`

Text Solution

Verified by Experts

The correct Answer is:
B
Moles of glucose `=(18)/(180)=0.1`
Moles of water `=(178.2)/(18)=9.9`
`rArr n_("Total")=10 rArr (Delta P)/(P^(@))=(0.1)/(10)rArr Delta P=0.01 P^(@)`
`=0.01xx760=7.6` torr
`P_(S)=760-7.6=752.4` torr
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