JEE CHEMISTRY MCQ: STATES OF MATTER

1 Medium

1 of 1

Application +4 | -1

What is the difference in the density of dry air at 1 atm and

25^{\circ} \mathrm{C}

and moist air with

50 \%

relative humidity under the same condition? The vapour pressure of water at

25^{\circ} \mathrm{C}

is 23.7 torr and dry air has

75.5 \%\,\, {~N}_2

and

24.5 \%\,\, {O}_2

View answer and explanation

Correct option: B

0.007\, \mathrm{~kg}\, \mathrm{~m}^{-3}

Option B (

0.007\, \mathrm{~kg}\, \mathrm{~m}^{-3}

) is correct because it represents the difference in density between dry air and moist air calculated considering the partial pressure of water vapor.

More Questions from STATES OF MATTER

Practice All Chapter MCQs →

A quantity of hydrogen gas occupies a volume of

30 \mathrm{~mL}

at a certain temperature and pressure. What volume would half this mass of hydrogen occupy at triple the absolute temperature and the pressure were one-ninth that of the original gas? In deriving the kinetic equation we make use of the root mean square speed of the molecules which is: Consider the following statements for kinetic molecular theory of gases
a. Particles of a gas move in all possible directions in straight lines.
b. At any particular time, different particles in the gas have different kinetic energies.
c. Collisions of gas molecules are perfectly inelastic in nature.
The correct statement(s) is/are The compressibility factor of an ideal gas is The relative strength of interionic/intermolecular forces in decreasing order is Compressibility factor of an ideal gas is