If two substances \( A \) and \( B \) have \( P_{A}^{0}: P_{B}^{0}=1: 2 \) and have mole fractio...

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If two substances \( A \) and \( B \) have \( P_{A}^{0}: P_{B}^{0}=1: 2 \) and have mole fraction in solution \( 1: 2 \), then mole fraction of \( A \) in vapours is:
(a) \( 0.33 \)
(b) \( 0.25 \)
(c) \( 0.52 \)
(d) \( 0.2 \)
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