19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Any gas shows maximum deviation from ideal gas 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
A gas will approach ideal behaviour at
a and b are van der Waals constants for gases. Chlorine is more easily liquefied than ethane because
Van der Waals constants ‘a’ and ‘b’ are related with..... respectively.
The units of the van der Waal’s constant ‘a’ are
The units of the van der Waal’s constant ‘b’ are
In van der Waals equation of state of the gas law, the constant ‘b’ is a measure of
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 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 which one of the following, does the given amount of chlorine exert the least pressure in a vessel of capacity 1 dm3 at 273 K? (KCET 2010)
A gaseous mixture contains 2 moles of A and 3 moles of B. Total pressure of the mixture is 5 atm. The partial pressures of A and B are respectively. (AFMC 2010)
2 g of hydrogen diffuse from a container in 10 min. How many gram of oxygen would diffuse through the same container in the same time under similar conditions? (Manipal 2010)