Gaseous State Test

Result

Gaseous State Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following does not determine the translational kinetic energy of an ideal gas?

A
Number of moles of gas

B
Temperature

C
Pressure of the gas

D
Amount of the gas

Solution

Translational kinetic energy doesn't depend upon the pressure of the gas.
Question 2
1 / -0

190.0 ml of N₂ was collected in ajar over water at some temperature, water level inside and outside the jar standing at the same height. If barometer reads 740 mm Hg and aqueous tension at the temperature of the experiment is 20 mm Hg, then what will be volume of the gas at 1 atm pressure and at the same temperature?

A
172 mL

B
220 mL

C
180 mL

D
192 mL

Solution

P₁(dry gas) = P_wet_gas - aqueous tension

= 740 - 20 = 720 mm,

V₁ = 190 ml

P₂ = 1 atm = 760 mm,

Apply P₁V₁ = P₂V₂

V₂ = 180 mL
Question 3
1 / -0

Statement-1: According to kinetic theory of gases the molecular collisions are non-elastic collision.

Statement-2: In non-elastic collisions energy and momenta of the molecules are not conserved.

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanation of Statement-1.

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

C
Statement-1 is true but Statement-2 is false.

D
Statement-1 is false but Statement-2 is true.

Solution

Molecular collisions, according to kinetic theory of gases, are elastic. In this case energy and momenta are conserved.
Question 4
1 / -0

The mean free path of a gas at constant volume

A
remains unchanged on changing pressure or temperature

B
none is correct

C
increases with increase in temperature

D
decreases with increase in pressure

Solution

The mean free path of a gas at constant volume remains unchanged on changing pressure or temperature.
Question 5
1 / -0

2 moles of N₂ and 1 mole of CO₂ are placed is a container at 25°C. Compared to nitrogen molecule, the CO₂ molecule will strike the wall of the container with

A
greater average speed

B
smaller average speed

C
greater average K.E.

D
smaller average K.E.

Solution

Average speed of a gas molecules varies inversely with the square root of molecular mass.