the boiling points of C6H6, CH3OH,C6H5NH2 and C6H5NO2 are 80c,65C,184C, and 212C respecti. which of the following will have highest vapour pressure at room temp.?

Higher the vapour pressure, more the liquid is volatile and so lesser is its boiling point.
(As boiling point is defined as the temperature at which the vapur pressure of liqied is becomes equal to the outer pressureor atmospheric pressure. Hence more volatile liquid’s vapor pressure would become equal to atmospheric pressure even at lower temperature and hence it is having lower boiling point).

Hello Student

Boiling point is the temperature at which vapour pressure of liquid becomes equal to that of atmospheric pressure. At boiling point, a substance is converted from liquid phase to vapoour phase.

Out of the given liquids, methanol (CH₃OH) has the lowest boiling point. Therefore at room temperature, methanol will show highest vapour pressure.

I hope this answer will help you.