The Gas Laws

IMPORTANT

The Gas Laws: Overview

In this topic, we will understand the different laws with their mathematical proof. It also explains their graphical representation indicating their relationships.

Important Questions on The Gas Laws

EASY
IMPORTANT

A gaseous mixture was prepared by taking equal mole of   COand N 2 . If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen   ( N 2 ) in the mixture is:

EASY
IMPORTANT

If 500ml of gas A at 400 torrs and 666.6 ml of B at 600 torrs are placed in a 3 liter flask, the pressure of the system will be

EASY
IMPORTANT

If 500ml of gas A at 400 torr and 666.6 ml of B at 600 torr are placed in a 3 litre flask, the pressure of the system will be

EASY
IMPORTANT

If P, V, M, T and R are pressure, volume, molar mass, temperature and gas constant respectively, then for an ideal gas, the density is given by

HARD
IMPORTANT

The density of the gaseous mixture in a vessel (N2 and He) at 2.1 atmosphere and 310 K is 1.35 g/litre. If a small pin-hole is made on the wall of the vessel, through which gases effuse, then which of the following is the correct composition of the gases He and N2   effusing out initially?

MEDIUM
IMPORTANT

A candle is burnt in a beaker until it extinguishes itself. A sample of gaseous mixture in the beaker contains 6.08×1020 molecules of N2, 0.76×1020 molecules of O2, and 0.50×1020 molecules of CO2. The total pressure is 734 mm of Hg. The partial pressure of O2 would be:

EASY
IMPORTANT

Draw the isotherm for different temperature of the gas.

MEDIUM
IMPORTANT

The below graph represents Gay-Lussac’s law.

Question Image

MEDIUM
IMPORTANT

Explain graphical representation of Gay-Lussac’s law.

MEDIUM
IMPORTANT

State the Gay-Lussac's law graphically.

MEDIUM
IMPORTANT

The slope of Gay-Lussac's law is 

MEDIUM
IMPORTANT

The graph between P and T according to Gay lussac's law is a

MEDIUM
IMPORTANT

If XM, XP and XV are mole fraction, pressure fraction and volume fraction, respectively, of a gaseous mixture, then

MEDIUM
IMPORTANT

A mixture of nitrogen and water vapour is admitted to a flask that contains a solid drying agent. Immediately after admission, the pressure in the flask is 760 Torr. After standing for some hours, the pressure reaches a steady value of 745 Torr. Calculate the mole percent of water vapour in the original mixture.

EASY
IMPORTANT

A gas is heated from 273 K to 373 K at 1 atm pressure. If the initial volume of the gas is 10 L, its final volume would be

EASY
IMPORTANT

If the density of a certain gas at 30C and 768 Torr is 1.35 kg/m3, then density at STP is 

EASY
IMPORTANT

Air expands on heating and hence its density _____. (increases/ decreases)

EASY
IMPORTANT

For a fixed amount of gas at constant temperature, volume of a gas is _____ proportional to the pressure of a gas.

HARD
IMPORTANT

Aqueous tension is dependent on

HARD
IMPORTANT

Aqueous tension is dependent on pressure.