Get premium membership and access questions with answers, video lessons as well as revision papers.

# Form 3 Chemistry Video Questions and Answers on Gas Laws

Form 3 Chemistry Video Questions and Answers on Gas Laws. Learn through well answered past exams questions.

Lessons (**12**)

- 1.
A given volume of ozone #(O_3)#, diffused from a certain apparatus in 96 seconds. Calculate the time taken by an equal volume of carbon(IV) oxide to diffuse under the same conditions (O=16.0,C=12.0

3m 48s - 2.
A gas occupies a volume of #400 cm^3 #at 500K and 1 atmosphere pressure. What will be the temperature of the gas when the volume and pressure of the gas is #100 cm^3# and 0.5 atmospheres respectively

2m 48s - 3.
A sealed glass tube containing air at s.t.p was immersed in water at #100^0C#. Assuming that there was no increase in the volume of glass tube due to the expansion of the glass,calculate the pressure of the gas inside the tube. (standard pressure=760mmHg,std temperature=273K)

2m 57s - 4.
#60cm^3# of oxygen gas diffused through a porous partition in 50 seconds. How long would it take #60cm^3# of sulphur (IV) oxide gas to diffuse through the same partition under the same conditions (S=32.0,O=16.0)

3m 45s - 5.
a) State the Charles’ Law
b)The volume of a sample of nitrogen gas at a temperature of 291K and #1.0×10^5# Pa was #3.5×10^-2m^3#.Calculate the temperature at which the volume of the gas would be #2.8×10^-2m^3# at #1.0×10^5# Pa

0m 0s - 6.
#100cm^3# of sample of ethane gas diffuses through a porous pot in 100 seconds. What is the molecular mass of the gas Q if #100cm^3# of the gas diffuses through the same porous pot in 121 seconds under the same conditions? (C=12.0,H=1.0)

3m 56s - 7.
#140cm^3# of nitrogen gas diffuses through a membrane in 70 seconds.How long will it take #200cm^3# of carbon (IV) oxide gas to diffuse through the same membrane under the same conditions of temperature and pressure.

4m 2s - 8.
Calculate the pressure which must be applied to a fixed mass of #100cm^3# of Oxygen for its volume to triple at #100000Nm^-2#

2m 0s - 9.
A fixed mass of a gas has a volume of #250cm^3# at a temperature of #27^0C# and 750mmHg pressure. Calculate the volume the gas would occupy at #42^0C# and 750mmHg pressure. (#0^0C#=273K)

3m 43s - 10.
a) State the Graham’s Law of diffusion
b) The molar masses of gases W and X are 16.0 and 44.0 respectively. If the rate of diffusion of W through a porous material is #12cm^3s^-1# .calculate the rate of
diffusion of X through the same material.

5m 9s - 11.
A certain mass of a gas occupies #0.15dm^3# at 293K and 98,648.5 Pa. Calculate its volume at 101325Pa and 273K.

4m 39s - 12.
a) State the Boyle’s Law
b) A gas occupies #500cm^3# at #27^0C# and 100000 Pa.What will be its volume at #0^0C# and 101325Pa?

5m 49s