19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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)
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…
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 order to increase the volume of a gas by 10%, the pressure of the gas should be (KCET 2008)
Critical temperature is the
The compressibility factor for an ideal gas is
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.
Positive deviation from ideal behaviour takes place because of
The compressibility factor of an ideal gas is
For H2 gas, the compressibility factor, Z = PV/n RT is:
The compressibility of a gas is less than unity at STP. Therefore
At high pressure, all the gases have
Dominance of strong repulsive force among the molecules of the gas (Z = compressibility factor)
The compressibility factor (Z) is defined as (a) real ideal V V (b) P Z nRT (c) ideal real V V (d) nRT Z PV
In Van der Waal’s equation of state for a non-ideal gas, the term that accounts for intermolecular forces is
The value of Van der Waal’s constant ‘a’ for the gases O2, N2, NH3 and CH4 are 1.360, 1.390, 4.170 and 2.253L2 atm mol–2 respectively. The gas which can most easily be liquified is
The term that corrects for the attractive forces present in a real gas in the van der Waals’ equation is
For one mole of a vander Waals’ gas when b = 0 and T = 300 K, the PV vs. 1/V plot is shown below. The value of the van der Waals’ constant a (atm L mol–2)
An open flask contains air at 27oC temperature and one atm pressure. The flask is heated to 127 oC at the same pressure. What fraction of the original air will remain in the flask?
In van der Waals equation of state of the gas law, the constant ‘b’ is a measure of
The units of the van der Waal’s constant ‘b’ are
The units of the van der Waal’s constant ‘a’ are
Van der Waals constants ‘a’ and ‘b’ are related with..... respectively.
a and b are van der Waals constants for gases. Chlorine is more easily liquefied than ethane because
A gas will approach ideal behaviour at