Questions
1
When you heat a sample of gas, what happens to the particles that make up the gas?
Answer:The particles move faster.
2
If helium and methane are allowed to diffuse out of the container under the similar conditions of temperature and pressure, then the ratio of rate of diffusion of helium to methane is:
Answer:2 : 1
3
The law, which states that at constant temperature, the volume of a given mass of gas is inversely proportional is pressure, is known as:
Answer:Boyles law
4
The rates of diffusion of gases are inversely proportional to square root of their densities . This statement refers to :
Answer:Grahams Law
6
The theory which explains that gases consist of molecules, which are in rapid option is known as:
Answer: Kinetic Molecular Theory
7
The rise or fall of a liquid within a tube of small bore is called:
Answer:Capillary Action
8
The states of matter having no definite shape but definite volume:
Answer:Liquid
10
If 20cm³ gas at 1 atm. is expanded to 50 cm³ at constant T, then what is the final pressure
Answer:20 × 150
11
The volume of 2.8 g of carbon monoxide at 27°C and 0.0821 atm is
Answer:30 L
12
In van der Waal equation of state of gas laws, the constant b is a measure of
Answer:Volume occupied by the molecules
13
Which of the following statement is wrong for gases?
Answer:Mass of the gas cannot be determined by weighing a container in which it is contained
14
The critical volumes of four gases A, B, C, D are respectively 0.025 L, 0.312 L, 0.245 L, 0.432 L, the gas with highest value of van der Wall constant b is
Answer:D
15
The value of universal gas constant R depends on
Answer:Units of Volume,Temperature and Pressure
16
A gas deviates from ideal behavior at a high pressure because its molecules:
Answer:Attract one another
18
The rate of diffusion methane is twice that of X. The molecular mass of X is
Answer: 64.0
19
Name the liquid with higher vapour pressure in the following pairs:
Answer:Alcohol, Petrol, Water
20
The vapour pressure of water at 300 K in a closed container is 0.4 atm. If the volume of container is doubled, its vapour pressure at 300 K will be
Answer:0.4 atm
Chapters
