19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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)
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)
At identical temperature and pressure, the rate of diffusion of hydrogen gas is 3 3 times that of a hydrocarbon having molecular formula
n n C H What is the value of n? (WB JEE 2010)
Average KE of CO2 at 27°C is E. The average kinetic energy of N2 at the same temperature will be (BVP 2010)
At what temperature, the RMS velocity of gas present at 50°C will be doubled? (OJEE 2010)
Given, RMS velocity of hydrogen at 300 K is 1.9 × 103 m/s. The RMS velocity of oxygen at 1200 K will be (OJEE 2010)
If the temperature changes from 27°C to 127°c relative percentage change in RMS velocity is (OJEE 2010)
a and b are van der Waals constants for gases. Chlorine is more easily liquefied than ethane because (KCET 2011)
The molecular velocity of any gas is (WB JEE 2011)
When r, P and M represent rate of diffusion, pressure and molecular mass, respectively, then the ratio of the rates of diffusion (rA/rB) of two gases A and B, is given as (WB JEE 2011)
Three different gases X, F and Z of molecular masses 2, 16 and 64 were enclosed in a vessel at constant temperature till equilibrium is reached. Which of the following Statement is correct? (Kerala CEE 2011)
Equal weights of CH4 and H2 are mixed in a container at 25°C. Fraction of total pressure exerted by methane is (DUMET 2011)