At `25^(@)C`, the vapour pressure of pure liquid `A ( mol wt. =40)` is `100 t o r r` , while that of pure liquid `B` is 40 torr, `( mol. Wt. =80 )`. The vapour pressure at `25^(@)C` of a solution containing `20g` of each A and B is :A. 80 torrB. `59.8 t o rr`C. `68 t o rr`D. 48 torr

At `25^(@)C`, the vapour pressure of pure liquid `A ( mol wt. =40)` is

1.	At `25^(@)C`, the vapour pressure of pure liquid `A ( mol wt. =40)` is `100 t o r r` , while that of pure liquid `B` is 40 torr, `( mol. Wt. =80 )`. The vapour pressure at `25^(@)C` of a solution containing `20g` of each A and B is :A. 80 torrB. `59.8 t o rr`C. `68 t o rr`D. 48 torr
Answer» Correct Answer - 1 Moles of A `=(20)/(40)rArr0.5,` Moles of B `=(20)/(80)rArr0.25,` `X_(A)=(0.5)/(0.5+0.25)=0.67,X_(B)=0.33` `P_("total")=P_(A)^(@)X_(A)+P_(B)^(@)X_(B)` `rArr" "100xx0.67+40xx0.33rArr80`torr

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At `25^(@)C`, the vapour pressure of pure liquid `A ( mol wt. =40)` is `100 t o r r` , while that of pure liquid `B` is 40 torr, `( mol. Wt. =80 )`. The vapour pressure at `25^(@)C` of a solution containing `20g` of each A and B is :A. 80 torrB. `59.8 t o rr`C. `68 t o rr`D. 48 torr

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