Ideal Gas Laws

IMPORTANT

Ideal Gas Laws: Overview

This topic covers concepts, such as, Gaseous State, Real and Ideal Gas Molecules, Gay-Lussac's Law & Universal Gas Constant etc.

Important Questions on Ideal Gas Laws

EASY
IMPORTANT

600 c.c. of a gas at a pressure of 750 mm is compressed to 500 c.c. Taking the temperature to remain constant, the increase in pressure, is

EASY
IMPORTANT

Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1 mole L-1?

(R=0.082 L  atmmol1deg1)

EASY
IMPORTANT

Select one correct statement. In the gas equation, PV = nRT

MEDIUM
IMPORTANT

The volume of air in a car tyre is about 1.50×10-2 m3 at a temperature of 0.0 °C and  pressure 250 kPa.

Calculate the number of molecules in the tyre( in no. of Molecules).

MEDIUM
IMPORTANT

A container of an ideal gas that is isolated from its surroundings is divided into two parts. One part has double the volume of the other. The pressure in each part is P and the temperature is the same. The partition is removed. What is the pressure in the container now? 

EASY
IMPORTANT

Which method do we use to separate a mixture of gases having different molecular weights?

EASY
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The equation of state corresponding to 8 g of O2 is,

MEDIUM
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If the pressure and the volume of certain quantity of ideal gas are halved, then its temperature

MEDIUM
IMPORTANT

The expansion of an ideal gas of mass m in volume V at constant pressure P is given by the straight line B. Then the expansion of the same ideal gas of mass 2m at a pressure 2P is given by the straight line

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EASY
IMPORTANT

The volume of vessel A is twice the volume of another vessel B and both of them are filled with the same gas. If the gas in A is at twice the temperature and twice the pressure in comparison to the gas in B, then the ratio of the gas molecules in A to that of B is

EASY
IMPORTANT

 The temperature of an open room of volume 30 m3 increases from 17oC to 27oC due to the sunshine. The atmospheric pressure in the room remains 1×105 Pa. If ni and nf are the number of molecules in the room before and after heating, then nf-ni will be:

EASY
IMPORTANT

Modern vacuum pumps can evacuate a vessel down to a pressure of 4.0 × 1 0 - 1 5  atm at room temperature (300 K). Taking R = 8.3 J K-1 mole-1, 1 atm=105 Pa and NAvogadro=6×1023mole-1, the mean distance between molecules of gas in an evacuated vessel will be of the order of:

EASY
IMPORTANT

For the P-V diagram given for an ideal gas
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 Out of the following which one correctly represents the T-P diagram?

HARD
IMPORTANT

Air is filled in a bottle at atmospheric pressure and it is corked at 35 °C. If the cork can come out at a pressure times the atmospheric pressure, then up to what temperature should the bottle be heated in order to remove the cork?

EASY
IMPORTANT

Significance of a and b in Van der Waals equation:

EASY
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Equation for an ideal gas is:

HARD
IMPORTANT

A thermally isolated cylindrical closed vessel of height 8 m is kept vertically. It is divided into two equal parts by a diathermic (perfect thermal conductor) frictionless partition of mass 8.3 kg. Thus the partition is held initially at a distance of 4 m from the top, as shown in the schematic figure below. Each of the two parts of the vessel contains 0.1 mole of an ideal gas at temperature 300 K. The partition is now released and moves without any gas leaking from one part of the vessel to the other. When equilibrium is reached, the distance of the partition from the top (in m) will be ______ (take the acceleration due to gravity =10 ms-2 and the universal gas =8.3 J mol-1 K-1).

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MEDIUM
IMPORTANT

An air bubble of radius 3.5 μm is at a depth of 5 m below the water surface. Taking atmospheric pressure as 105 Pa, Surface tension of water as 0.07 N m-1, and density of atmospheric air as 1.2 kg m-3,the density is x×10-1 kg m-3 of air inside the air bubble, find x.

HARD
IMPORTANT

The change in the magnitude of the volume of an ideal gas when a small additional pressure ΔP is applied at a constant temperature, is the same as the change when the temperature is reduced by a small quantity ΔT at constant pressure. The initial temperature and pressure of the gas were 300 K and 2 atm. respectively. If |ΔT|=C|ΔP| then value of C in K/atm. is ___________ .

EASY
IMPORTANT

Which one is the correct dimensional formula for Boltzmann constant?