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Raoult's law for a solution of two volatile liquids states that the partial pressure of component 1 is:
Ap₁ = p₁⁰ × x₂
Bp₁ = p₁⁰ × x₁
Cp₁ = p₁⁰ + x₁
Dp₁ = p₁⁰ / x₁
Answer & Solution
Correct answer: B. p₁ = p₁⁰ × x₁
**Raoult's law (volatile components):** p_i = p_i⁰ × x_i. The partial pressure is directly proportional to the mole fraction in solution; the proportionality constant is the vapour pressure of the *pure* component.
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