The ratio of vapour pressure of two miscible liquids and in pure state are in the…

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Problem

The ratio of vapour pressure of two miscible liquids

A

and

B

in pure state are in the ratio 1 : 3 respectively at a temperature.

n_A

mole of

A

and

n_B

mole of

B

are mixed to form an ideal solution. If the ratio of mole of

A

and

B

in vapour phase was found to be 4 : 3, the ratio of mole of

A

and

B

in which they are mixed was : (1)

\frac{4}{5}

(2) 4 (3)

\frac{2}{3}

(4)

\frac{1}{3}