The boiling points of $C_{6} H_{6}, {C H}_{3} O H, C_{6} H_{5} {N H}_{2}$ and $C_{6} H_{5} {N O}_{2}$ are $80^{0} C, 65^{0} C, 184^{0} C$ and $212^{0} C$ respectively. Which of these will show highest vapour pressure at room temperature?

C_{6} H_{6}

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{C H}_{3} O H

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C_{6} H_{5} {N H}_{2}

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C_{6} H_{5} {N O}_{2}

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Solution

The correct option is B ${C H}_{3} O H$
The lower the boiling point, the higher the vapor pressure. Out of given options, $C H_{3} O H$ has the lowest boiling point. So, it has the highest vapor pressure.

The answer is option $B$ .

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