General properties of gases

1.Which is the correct relation between the diffusion rates of gases and their densities?
A. r₁/r₂ = √d₁/d₂
B. r₁/r₂ – √d₂/d₁
C. r₁/r₂ – √d₁/d₂
D. r₁/r₂ – d₂/d₁
Option”B” is correct
2.which gas is lighter than air
A. oxygen
B. ammonia
C. chlorine
D. propane
Option”B” is correct
3.Under what conditions does a real gas behave like an ideal gas?
A. high pressure low temperature
B. low pressure high temperature
C. high temperature high pressure
D. low pressure low temperature
Option”B” is correct
4.If an open bottle of perfume is kept in a corner of a room, its fragrance spreads to all the parts of the room, this is because
A. evaporation
B. evaporation
C. diffusion
D. sublimation
Option”C” is correct
5.Despite the difference in density, the process of mixing of gases against the force of gravity of the earth is called natural process.
A. evaporation of gases
B. liquefaction of gases
C. diffusion of gases
D. evaporation of gases
Option”C” is correct
6.Evaporation density of a gas is 14, what will be its molecular weight?
A. 14
B. 21
C. 28
D. 42
Option”C” is correct
7.The molecular mass of a gas is proportional to its vapor density
A. double
B. treble
C. four times
D. half
Option”A” is correct
8.The law of diffusion of gases is used
A. to separate isotopes
B. To determine the vapor density of gases
C. to separate a mixture of gases
D. all of these
Option”D” is correct
9.The rate of diffusion of carbon carbon dioxide is less than that of air, because it
A. gets lighter
B. gets heavy
C. is very light
D. quite heavy
Option”B” is correct
10.The essential condition for the diffusion of gases is that the chemical percentage between them
A. be possible
B. not be possible
C. be slow
D. be fast
Option”B” is correct