19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
a and b are van der Waals constants for gases. Chlorine is more easily liquefied than ethane because (KCET 2011)
If the temperature changes from 27°C to 127°c relative percentage change in RMS velocity is (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)
At what temperature, the RMS velocity of gas present at 50°C will be doubled? (OJEE 2010)
Average KE of CO2 at 27°C is E. The average kinetic energy of N2 at the same temperature will be (BVP 2010)
n n C H What is the value of n? (WB JEE 2010)
At identical temperature and pressure, the rate of diffusion of hydrogen gas is 3 3 times that of a hydrocarbon having molecular formula
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)
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)
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)
A gas of volume 100 cc. is kept in a vessel at pressure 104 Pa maintained at temperature 24ºC if now the pressure is increased to 105 Pa, keeping the temperature constant, then the volume of the gas becomes
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
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)
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…
The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is (AFMC 2008)
The critical temperature of water is higher than that of O2 because the H2O molecule has
An ideal gas can’t be liquefied because
Which set of conditions represents easiest way to liquiefy a gas?
The critical temperature of a substance is defined as :
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 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