States of Matter Test

Result

States of Matter Test - 12

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Weekly Quiz Competition

Question 1
4 / -1

The vander Waal’s constant ‘a’ for the gases O₂, N₂, NH₃ and CH₄ are 1.3, 1.390, 4.170 and 2.253 L² atm mol^-2 respectively. The gas which can be most easily liquefied is

A
O₂

B
N₂

C
NH₃

D
CH₄
Question 2
4 / -1

Which of the following pairs will diffuse at the same rate through a porous plug?

A
CO, NO₂

B
NO₂, CO₂

C
NH₃, PH₃

D
NO, C₂H₆

Solution
Question 3
4 / -1

The r.m.s velocity at NTP of the species can be calculated from the expression

A

B

C

D
All the above

Solution
Question 4
4 / -1

Root mean square velocity of a gas molecule is proportional to

A
m^1/2

B
m^o

C
m^-1/2

D
m

Solution
Question 5
4 / -1

In vander Waal’s equation of state for a non-ideal gas, the term that accounts for intermolecular forces is:

A
(V – b)

B
(RT)^-1

C

D
RT

Solution
Question 6
4 / -1

In a closed flask of 5 litres, 1.0g of H₂ is heated from 300 to 600K. Which statement is not correct?

A
Pressure of the gas increases

B
The rate of collision increases

C
The number of moles of gas increases

D
The energy of gaseous molecules increases
Question 7
4 / -1

Which is not true in case of an ideal gas?

A
It cannot be converted into a liquid

B
There is no interaction between the molecules

C
All molecules of the gas move with same speed

D
At a given temperature, PV is proportional to the amount of the gas
Question 8
4 / -1

Vander Waal’s equation of state is obeyed by real gases. For n moles of a real gas, the expression will be

A

B

C

D

Solution
Question 9
4 / -1

The correct value of the gas constant ‘R’ is close to:

A
0.082 litre-atmosphere K

B
0.082 litre-atmosphere K^-1 mol^-1

C
0.082 litre-atmosphere^-1 K mole^-1

D
0.082 litre^-1 atmosphere^-1 K mol
Question 10
4 / -1

If C₁, C₂, C₃…….represent the speeds of n₁, n₂, n₃….molecules, then the root mean square speed is

A

B

C

D

Solution