Two liquids X and Yform an ideal solution. At 300 K, vapour pressure of the solution containing I mol of X and 3 mol of Y is 550 mmHg. At the same temperature, if 1 mol of Y isfurther added to this solution, vapour pressure of the solution increases by I 0 mmHg. Vapour pressure ( in mmHg) of X and Yin their pure states will be, respectively:

Two liquids X and Yform an ideal solution. At 300 K, vapour pressure o

1.	Two liquids X and Yform an ideal solution. At 300 K, vapour pressure of the solution containing I mol of X and 3 mol of Y is 550 mmHg. At the same temperature, if 1 mol of Y isfurther added to this solution, vapour pressure of the solution increases by I 0 mmHg. Vapour pressure ( in mmHg) of X and Yin their pure states will be, respectively:
Answer» 300 and 400 400 and 600 500 and 600 200 and 300 Solution :`P _("total") =p_(A) ^(@)X_(A) + p _(B)^(@) X _(B)` `550 =p_(A)^(@) xx1/4 +p_(B)^(@) xx3/4` `p _(A)^(@) + 3P _(B)^(@) =550 xx 4 ""…(i)` In seond case `P _("total") = p_(A)^(@) xx1/5 +p_(B)^(@) xx4/5` `p _(A) ^(@)_ +4P _(B)^(@) =560 xx5 ""...(II)` Subtract (i) from (ii) `therefore jp _(B)^(@) =560 xx5-550 xx 4=600` `because p _(A)^(@) =400`