Chemistry Question Bank

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)

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)

At what temperature will the RMS velocity of SO2 be the same as that of O2 at 303K? (KCET 2013)

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

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 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…

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 …

The RMS speed of helium in ms-1 (atomic mass = 4.0 g mol-1) at 400 K is (EAMCET 2014)

The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is: (WB JEE 2015)

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…

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…

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

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)

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

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)

Calculate the number of moles in the glass bulb shown in figure at 300 K. Given : density of glycerine = 2.72 g/mL; density of mercury = 13.6g/mL

For V versus T plot at constant pressure P1 and P2 for an ideal gas is given in adjoining figure. Which of the following relation is correct ?

Among the plots of P versus V, as given below, which one corresponds to Boyle’s law ? (a) (b) (c) (d)

An open flask contains air at 27oC temperature and one atm pressure. The flask is heated to 127 oC at the same pressure. What fraction of the original air will remain in the flask?

Which of the following is a correct plot of the volume of fixed amount of ideal gas as a function of temperature (at constant pressure) ? (a) (b) (c) (d)

A flask containing air (open to atmosphere) is heated from 300 K to 500 K. The percentage of air escaped to the atmosphere is nearly

If the pressure is tripled and temperature (in kelvins) is halved, the volume of a given mass of an ideal gas becomes

How many O2 molecules are present in 2.0 L of oxygen gas at 27oC temperature and 3.0 atm pressure ?

If the absolute temperature of a gas is doubled and the pressure is reduced to one-half, the volume of the gas will