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A solution has 1:4 mole ratio of pentane...

A solution has `1:4` mole ratio of pentane to hexane . The vapour pressure of pure hydrocarbons at `20^@C`are `440` mmHgfor pentane and `120`mmHg for hexane .The mole

A

`0.549`

B

`0.200`

C

`0.786`

D

`0.478`

Text Solution

Verified by Experts

The correct Answer is:
D
`P_(T)=p_(p)^(o)x_(p)+p_(h)^(o)x_(h)=440xx(1)/(5)+120xx(4)/(5)`
`=88+96=184, p_(p)^(o)x_(p)=y_(p)P_(T),(88)/(184)=y_(p)`
`y_(p)=0.478`
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