Chemistry Question Bank

At high pressure, all the gases have

The compressibility of a gas is less than unity at STP. Therefore

For H2 gas, the compressibility factor, Z = PV/n RT is:

The compressibility factor of an ideal gas is

Positive deviation from ideal behaviour takes place because of

The compressibility factor (Z) is the ratio of I. PV and nRT II. Actual molar volume of gas to molar volume of it. Choose the correct option.

The compressibility factor for an ideal gas is

Critical temperature is the

The liquefaction behavior of the temporary gases like CO2, approaches that of permanent gases like N2, O2 etc., as we go

Gases possess characteristic critical temperature which depends upon the magnitude of intermolecular forces between the gas particles. Critical temperatures of ammonia and carbon dioxide are 405.5 K and 304.10 K respe…

Assertion (A) Gases do not liquefy above their critical temperature even on applying high pressure, Reason (R) Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the mol…

Statement I critical temperature is the highest temperature at which condensation of a gas is possible. Statement II Critical pressure is the highest pressure at which a liquid will boil when heated Identify the corre…

The critical temperature of a substance is defined as :

Which set of conditions represents easiest way to liquiefy a gas?

An ideal gas can’t be liquefied because

The critical temperature of water is higher than that of O2 because the H2O molecule has

The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is (AFMC 2008)

A 4.0 dm3 flask containing N2 at 4.0 bar was connected to a 6.0 dm3 flask containing helium at 6.0 bar, and the gases were allowed to mix isothermally. Then, the total pressure of the resulting rnixture will be. (Kera…

A cylinder of 5 L capacity, filled with air at NTP is connected with another evacuated cylinder of 30 L capacity. The resultant air pressure in both the cylinders will be (AMU 2008)

The volume-temperature graphs of a given mass of an ideal gas at constant pressure are shown below: (DUMET 2008) What is the correct order of pressure? (a) p p p (b) p p p (c) p p p (d) p p p

In order to increase the volume of a gas by 10%, the pressure of the gas should be (KCET 2008)

When a bottle of dry ammonia and a bottle of dry HCl connected through a long tube are opened simultaneously at both ends, at first (Kerala CEE 2008)

In a flask of 'V' litres, 0.2 mole of O2, 0.4 mole of N2, 0.1 mole of NH3 and 0.3 mole of He gases are present at 27°C. If total pressure exerted by these non-reacting gases is 1 atm, the partial pressure exerted by N…

If two molecules of A and B have mass 100 kg and 64 kg and rate of diffusion of A is 12 × 10-3, then what will be the rate of diffusion of B? (BCECE 2008)

The term that corrects for the attractive forces present in a real gas in the van der Waals equation is (KCET 2009)