19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
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)
The term that corrects for the attractive forces present in a real gas in the van der Waals’ equation is
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
Van der Waals constants ‘a’ and ‘b’ are related with..... respectively.
The units of the van der Waal’s constant ‘a’ are
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
Two separate bulbs contain ideal gases A and B. The density of gas A is twice that of gas B. The molecular mass of A is half that of gas B. The two gases are at the same temperature. The ratio of the pressure of A to …
In case of hydrogen and helium, the van der Waal’s forces are
Any gas shows maximum deviation from ideal gas at
For a gas deviation from ideal behaviour is maximum at :
A gas is said to behave like an ideal gas when the relation PV/T = constant. When do you expect a real gas to behave like an ideal gas ?
The pressure of real gases is less than that of ideal gas because of
The ratio of root mean square velocity to average velocity of a gas molecule at a particular temperature is
The average velocity of an ideal gas molecule at 27ºC is 0.3 m/s. The average velocity at 927º C will be
At constant volume, for a fixed number of moles of a gas the pressure of the gas increases with rise of temperature due to
The ratio between the root mean square speed of H2 at 50K and that of O2 at 800 K is
The r.m.s. velocity of hydrogen is 7 time the r.m.s. velocity of nitrogen. If T is the temperature of the gas,