Chemistry Question Bank

In which one of the following, does the given amount of chlorine exert the least pressure in a vessel of capacity 1 dm3 at 273 K? (KCET 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)

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)

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)

Avogadro’s law is the combination of I. Charles’ law. II. Boyle’s law. III. Dalton’s atomic theory. IV. Gay lussac’s law of combining volume Select the correct option.

At the same temperature and pressure, which of the following gases will have the highest kinetic energy per mole ?

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

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