Chemistry Question Bank

Gay-Lussac’s law of combining volume is applicable for those gases which on mixing :

A gas is initially at 1 atm pressure. To compress it to 1/4 th of its initial volume, assuming temperature to be constant pressure to be applied is

A sample of gas has a volume of 0.2 lit measured at 1 atm pressure and 0oC. At the same pressure, but at 273K, its volume will become

A sample of gas occupies 100 ml at 27oC and 740 mm pressure. When its volume is changed to 80 ml at 740 mm pressure, the temperature of the gas will be

When gases are heated from 20 to 40ºC at constant pressure, their volumes

300 ml of a gas at 27oC is cooled to –3oC at constant pressure, the final volume is

A gas at 298 K is shifted from a vessel of 250 cm3 capacity to that of 1L capacity. The final pressure of the gas will

At 25oC temperature and 730 mm pressure, 380 mL of dry oxygen was collected. If the temperature is held constant, what volume will be oxygen occupy at 760 mm pressure?

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

At constant temperature, in a given mass of an ideal gas

If 20 cm3 gas at 1 atm. is expanded to 50 cm3 at constant T, then what is the final pressure ? (a) 20 50 x (b) 50 20 x (c) x x

A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume O2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 L bar K-1 mol-1) (NEET 2022)

Which one is not correct mathematical equation for Dalton's Law of partial pressure? Here p = total pressure of gaseous mixture (NEET 2022)

The volume occupied by 1.8 g of water vapour at 374°C and 1 bar pressure will be [Use R = 0.083 bar L K-1 mol-1] (NEET (Odisha) 2019)

Assertion: The graph between Pv/s V is a straight line. Reason: For adiabatic process, P 1/V (AIIMS 2019)

A 100 mL flask contained H 2 at 200 torr and a 200 M flask contained He at 100 torr. The two flasks were then connected so that each gas filled their combined volume Assume, no change in temperature, total pressure is…

Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure Pi and temperature T1 are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of…

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…

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)

Density of carbon monoxide is minimum at (KCET 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)