States of Matter: Gases and liquids Test

Result

States of Matter: Gases and liquids Test - 9

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The average kinetic energy of a hydrogen molecule at 300 K is E. At the same temperature, the average kinetic energy of an oxygen molecule will be

A
E/16

B
E

C
4E

D
E/4

Solution

Kinetic energy of an ideal gas is a function of its temperature only. Hence, it remains constant for equal number of molecules of any gas at a constant temperature.

K.E. = 3/2 kT, where k is the Boltzmann constant.
Question 2
1 / -0

The following question has four choices, out of which ONLY ONE is correct.

Ammonia, neon and nitrogen gases all at the same initial temperature and pressure were expanded adiabatically separately to double of their original volumes. Identify the gas(es) which would require the large amount of heat so that the original temperature is restored.

A
Ammonia

B
Neon

C
Nitrogen

D
All of these

Solution

Ammonia has the strongest intermolecular forces of attraction (H-bonding), it would use up the greatest quantity of its internal energy to overcome these forces. Hence, ammonia would require the highest amount of heat in order to restore the initial temperature.
Question 3
1 / -0

What is the state of a substance at 0 K?

A
Solid or liquid

B
Gas or liquid

C
Gas or solid

D
Always a liquid

Solution

A substance cannot exist in the gaseous state at 0 K.
Question 4
1 / -0

Which of the following is not a property of the liquid state of matter?

A
Liquids have a definite shape.

B
They have a fixed volume.

C
Their interparticle forces are intermediate between solids and gases.

D
They can evaporate at a temperature lower than their boiling point.

Solution

Liquids and gases are fluids and do not have any definite shape.
Question 5
1 / -0

The spherical shape of a water drop is because of

A
H-bonding

B
viscosity

C
surface tension

D
low density

Solution

Surface tension causes the water drops to be spherical.
The water drops acquire a spherical shape in order to minimise the surface tension, by reducing the surface area.
Question 6
1 / -0

The property of water that is a result of surface tension is:

A
high boiling point

B
capillary action

C
fluidity

D
pressure

Solution

The capillary action of water is due to surface tension.
The resultant force acting on the surface molecules causes the liquid to rise in thin capillaries.
Question 7
1 / -0

The vapour pressure of water is

A
higher than that of ethanol

B
lower than that of ethanol

C
equal to that of ethanol

D
20^oC higher than ethanol

Solution

Water has higher boiling point and lower vapour pressure than those of ethanol.
This is because H-bonding in water is stronger as compared to ethanol.
Question 8
1 / -0

Which of the following liquids has the least viscosity?

A
Honey

B
Water

C
Glycerol

D
Ethylene glycol

Solution

Water has the least viscosity among the given fluids and has maximum fluidity.
Question 9
1 / -0

The critical temperature of water is

A
373 K

B
374^oC

C
100^oC

D
273 K

Solution

The critical temperature is the minimum temperature to which a gas must be cooled, in order to liquefy it by applying pressure.
The critical temperature of water is 374^oC or 647 K.
Question 10
1 / -0

Select the wrong statement.

A
Oxygen does not liquefy easily as it has a high critical temperature.

B
Nitrogen and hydrogen have low critical temperatures.

C
A gas does not liquefy above its critical temperature.

D
The critical temperature of CO₂ is high.

Solution

The critical temperature of oxygen is low, and hence, it does not liquefy easily.
Gases like hydrogen, oxygen and nitrogen that have low critical temperatures do not liquefy easily and are referred to as permanent gases.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

States of Matter: Gases and liquids Test - 9

Result

States of Matter: Gases and liquids Test - 9

Score

-

Rank

-

SHARING IS CARING

Question 1

E/16

E

4E

E/4

Solution

Question 2

Ammonia

Neon

Nitrogen

All of these

Solution

Question 3

Solid or liquid

Gas or liquid

Gas or solid

Always a liquid

Solution

Question 4

Liquids have a definite shape.

They have a fixed volume.

Their interparticle forces are intermediate between solids and gases.

They can evaporate at a temperature lower than their boiling point.

Solution

Question 5

H-bonding

viscosity

surface tension

low density

Solution

Question 6

high boiling point

capillary action

fluidity

pressure

Solution

Question 7

higher than that of ethanol

lower than that of ethanol

equal to that of ethanol

20oC higher than ethanol

Solution

Question 8

Honey

Water

Glycerol

Ethylene glycol

Solution

Question 9

373 K

374oC

100oC

273 K

Solution

Question 10

Oxygen does not liquefy easily as it has a high critical temperature.

Nitrogen and hydrogen have low critical temperatures.

A gas does not liquefy above its critical temperature.

The critical temperature of CO2 is high.

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

20^oC higher than ethanol

374^oC

100^oC

The critical temperature of CO₂ is high.