The boiling points of , , and are , , and , respectively. Which of the following will have the highest vapour pressure at the room temperature?

Question

The boiling points of $	ext{C}_6	ext{H}_6$, $	ext{CH}_3	ext{OH}$, $	ext{C}_6	ext{H}_5	ext{NH}_2$ and $	ext{C}_6	ext{H}_5	ext{NO}_2$ are $80^\circ	ext{C}$, $65^\circ	ext{C}$, $184^\circ	ext{C}$ and $212^\circ	ext{C}$, respectively. Which of the following will have the highest vapour pressure at the room temperature?

Prashant Kotian · Accepted Answer

Correct answer: B. Vapour pressure is inversely proportional to the boiling point of a liquid. A liquid with a lower boiling point has weaker intermolecular forces and thus a higher vapour pressure at a given temperature. has the lowest boiling point (). Therefore, correct answer is B.

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