19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
X ml of H2 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical condition is
If the absolute temperature of a gas is doubled and the pressure is reduced to one-half, the volume of the gas will
How many O2 molecules are present in 2.0 L of oxygen gas at 27oC temperature and 3.0 atm pressure ?
If the pressure is tripled and temperature (in kelvins) is halved, the volume of a given mass of an ideal gas becomes
The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is: (WB JEE 2015)
The RMS speed of helium in ms-1 (atomic mass = 4.0 g mol-1) at 400 K is (EAMCET 2014)
Two gases X (molecular weight MX) and Y (molecular weight MY) (MY > MX) are at the same temperature, T in two different Containers. Their root mean square velocities are CX and CY respectively. If the average kinetic …
If average velocity of a sample of gas molecules at 300 K is 5 cm s-1, what is RMS velocity of same sample of gas molecules at the same temperature? (Given, : : u v 1 : 1.224 : 1.127) (most probable velocity), u(RMS…
Density of carbon monoxide is minimum at (KCET 2014)
Equal mass of H2, O2 and methane have been taken in a container of volume V at temperature 27oC in identical conditions. The ratio of the volumes of gases H2 : O2 : CH4 would be (CBSE AIPMT 2014)
If Z is a compressibility factor, Van der Waals equation at low pressure can be written as: (WB JEE 2014) (a) a Z =1- VRT (b) Pb Z =1- RT (c) Pb Z =1+ RT (d) RT Z =1+ Pb
At what temperature will the RMS velocity of SO2 be the same as that of O2 at 303K? (KCET 2013)
For gaseous state, if most probable speed is denoted by C*, average speed by C and root mean square speed by C, then for a large number of molecules, the ratios of these speeds are (WB JEE 2013)
One mole of oxygen at 273 K and one mole of sulphur dioxide at 546 K are taken in two separate containers, then (UPCPMT 2012)
The compressibility factor for a real gas at high pressure is (OJEE 2012) (a) RT Pb
By what factor does the average velocity of a gaseous molecule increases, when the temperature (in kelvin) is doubled? (CBSE AIPMT 2011)
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…