General Properties of Gases: MCQ Test (25 questions)

Question 1 of 25

When the volume of a gas is reduced at constant temperature, its pressure

Agoes down
Bincreases
CFirst it decreases and then it increases.
Dremains unchanged

Question 2 of 25

When an open bottle of perfume is placed in a corner of a room, its fragrance spreads throughout the room. Why does this happen?

Aevaporation
Bevaporation
Cdiffusion
Dsublimation

Question 3 of 25

Under what conditions does a real gas behave like an ideal gas?

Ahigh pressure and low temperature
Blow pressure and high temperature
Chigh pressure and high temperature
Dlow pressure and low temperature

Question 4 of 25

What is the molecular weight of a gas relative to its vapor density?

Adouble
Btriple
Cfour times
Dhalf

Question 5 of 25

All gases attain zero volume when the temperature is

A273°C
B27.3°C
C-273°C
D0°C

Question 6 of 25

The vapor density of a gas is 14, its molecular weight will be

A14
B21
C28
D43

Question 7 of 25

Absolute zero temperature is—

Athe starting point of any temperature scale
Btheoretically lowest possible temperature
CThe temperature at which all liquid substances freeze.
DThe temperature at which all substances are in the vapor phase.

Question 8 of 25

The law of diffusion of gases is used in-

Ain separating isotopes
BIn determining the vapor density of gases
Cseparating a mixture of gases
DIn all of these

Question 9 of 25

Under the same conditions of temperature and pressure, whose number is the same in equal volumes of different gases?

Aof the atom
Bof the molecule
Cof the radical
Dof electron

Question 10 of 25

The volume of 22 grams of CO² at NTP will be

A22.4 liters
B11.2 litres
C44.8 liters
D2.24 liters

Question 11 of 25

Compressing a gas

AThe stakes only rise
BOnly the temperature rises
CBoth pressure and temperature increase
Dpressure increases and temperature decreases

Question 12 of 25

The pressure/density value for a given amount of gas at a given temperature remains constant. Which law explains this conclusion?

Afrom Charles's law
Bfrom Boyle's law
CFrom Pascal's law
Dfrom the design of the Avogadro

Question 13 of 25

Which of the following laws is not related to gases?

ABoyle's Law
BCharles's Law
CGay-Lussac's law
DFaraday's law

Question 14 of 25

The rate of diffusion of CO² is less than that of air because it is more diffusive than air.

Ais lighter
Bis heavy
CIt is quite light
Dare quite heavy

Question 15 of 25

The ratio of the rates of diffusion of oxygen and hydrogen gas is

A0.044444444444444
B0.042361111111111
C0.043055555555556
D0.084027777777778

Question 16 of 25

Who formulated the law of diffusion of gases?

ABoyle
BCharles
Cavocado
DGram

Question 17 of 25

In the gaseous equation pV=RT, nR represents

AAny atom of the gas
BOne gram of gas
Cone mole of gas
Done liter of gas

Question 18 of 25

Which is the correct relationship between the diffusion rates of gases and their densities?

Ar¹/r²=√d¹/d²
Br¹/r²√d²/d¹
Cr¹/r²=d¹/d²
Dr¹/r²=d²/d¹

Question 19 of 25

The value of absolute temperature is-

A0°C
B-273°C
C100°C
D180°K

Question 20 of 25

Which law in physics states that equal volumes of all gases contain the same number of molecules under the same temperature and pressure?

AOhm's law
BAvogadro's Law
CBoyle's Law
DCharles's Law

Question 21 of 25

A chemical reaction between gases is a necessary condition for diffusion of gases.

Abe possible
Bmay not be possible
Cbe slow
Dbe fast

Question 22 of 25

A gas lighter than air is

Aoxygen
Bammonia
Cchlorine
DPropane

Question 23 of 25

15. The natural process by which gases mix with each other despite differences in densities, against the gravitational force of the Earth, is called

Avaporization of gases
BLiquefaction of gases
Cdiffusion of gases
Devaporation of gases

Question 24 of 25

The relative velocities of diffusion of different gases at a fixed temperature and pressure are inversely proportional to the square root of their densities." This law is

ABoyle's Law
BCharles's Law
CGraham's Law
DDalton's law

Question 25 of 25

rate of diffusion of a gas

Ais directly proportional to the density
BIt is directly proportional to the molecular weight.
Cis directly proportional to the square root of the molecular weight
Dis inversely proportional to the square root of the molecular weight