Matter in Our Surrounding Test

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Matter in Our Surrounding Test - 29

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Weekly Quiz Competition

Question 1
1 / -0

Evaporative cooling is the phenomenon _____________.

A
in which molecule of liquid with high kinetic energy evaporates quickly, leaving behind the particle of less kinetic energy

B
in which molecule of liquid with low kinetic energy evaporates quickly, leaving behind the particle of high kinetic energy

C
in which density of liquid changes

D
none of these

Solution

Evaporation is the surface phenomenon in which the liquid molecules that have high kinetic energy evaporates quickly from the surface of the liquid. Thus the molecules with less kinetic energy remain in the solution and, as result the temperature of the liquid decreases. This phenomenon is known as evaporative cooling.
Question 2
1 / -0

Evaporation is a _______ phenomenon.

A
surface

B
bulk

C
solid

D
none

Solution

$$Surface$$ phenomenon is a process in which only the surface of any substance or object is involved in the process. In Evaporation only the surface of the liquid involves in the process, its bulk remains unaffected by evaporation. Hence, it is a surface phenomenon.
Question 3
1 / -0

One mole of argon gas will have least density at:

A
STP

B
$$0^0C$$ and 1 atm

C
$$273^0C$$ and 2 atm

D
$$273^0C$$ and 1 atm

Solution

The density of any gas is given by the formula:

$$d=\dfrac{PM}{RT}$$

Therefore, the density will be minimum when the ratio of pressure to temperature is minimum.

We can see that this is the lowest in option D as the temperature is maximum and pressure is minimum.

Thus, the correct option is $$D$$.
Question 4
1 / -0

The process by which molecules undergo a spontaneous transition from the liquid phase to the gaseous phase is called as:

A
freezing

B
sublimation

C
evaporation

D
condensation

Solution

Evaporation is a process by which molecules undergo a spontaneous transition from the liquid phase to the gaseous phase.

Freezing is a phase transition where a liquid turns into a solid.

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage.

Condensation is the reverse of evaporation in which water vapour converts into liquid water.
Question 5
1 / -0

Solid $$CO_2$$ gets converted into gaseous state on decreasing the ___________.

A
pressure

B
temperature

C
heat

D
None of these

Solution

Solid $$CO_2$$ gets converted into the gaseous state by decreasing the pressure to 1 atmosphere without coming into the liquid state. Hence, solid carbon dioxide is also known as dry ice.
Question 6
1 / -0

Which among the following have moderate intermolecular forces?

A
Solids

B
Liquids

C
Gases

D
Equal in liquids and gases both

Solution

Intermolecular forces of attraction are maximum in solids, moderate in liquids and minimum in gases.
So, option B is correct.
Question 7
1 / -0

What is the effect on the chemical and physical properties of water when the temperature is changed?

A
The chemical properties of water remain the same but the physical state changes with a temperature change.

B
The chemical properties of water change with temperature change but physical properties remain the same.

C
There is no effect on the chemical or physical properties of water when the temperature is changed.

D
Both chemical and physical properties of water change with a temperature change.

Solution

When the temperature is changed (increasing), water is converted from ice to water and then to steam depending upon the temperature. There is no change in the chemical properties of water and only physical state changes.
Question 8
1 / -0

The intermolecular forces of attraction is maximum in _______.

A
solid

B
liquid

C
gas

D
none of these

Solution

The intermolecular/interatomic force of attraction is maximum in solids. Due to this, the molecules of solids are closely packed.
The order of force of intermolecular force of attraction is in the following order:

solid > liquid > gas
Question 9
1 / -0

Which of the following arrangement represents a liquid?

A
I

B
II

C
III

D
All of the above

Solution

In liquid, the inter-particle space is intermediate. This means the inter-particle space of liquid is more than solid but less than gas.
From the given diagram $$\text{I}$$ represents gas, $$\text {II}$$ represents liquid and $$\text {III}$$ is solid.
Hence, option $$B$$ is correct.
Question 10
1 / -0

A liquid can change its shape easily. This can be attributed to which of the following fact.

A
Strong intermolecular forces.

B
Weak intermolecular forces.

C
Non existing intermolecular forces.

D
Either A or C

Solution

A liquid can change its shape easily. This can be attributed to weak intermolecular forces. The intermolecular force of attraction between the molecules in a liquid is less when compared to solids. Due to this, the liquids occupy a definite volume but have no definite shape.

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Re-Attempt Weekly Quiz Competition

Matter in Our Surrounding Test - 29

Result

Matter in Our Surrounding Test - 29

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SHARING IS CARING

Question 1

in which molecule of liquid with high kinetic energy evaporates quickly, leaving behind the particle of less kinetic energy

in which molecule of liquid with low kinetic energy evaporates quickly, leaving behind the particle of high kinetic energy

in which density of liquid changes

none of these

Solution

Question 2

surface

bulk

solid

none

Solution

Question 3

STP

$$0^0C$$ and 1 atm

$$273^0C$$ and 2 atm

$$273^0C$$ and 1 atm

Solution

Question 4

freezing

sublimation

evaporation

condensation

Solution

Question 5

pressure

temperature

heat

None of these

Solution

Question 6

Solids

Liquids

Gases

Equal in liquids and gases both

Solution

Question 7

The chemical properties of water remain the same but the physical state changes with a temperature change.

The chemical properties of water change with temperature change but physical properties remain the same.

There is no effect on the chemical or physical properties of water when the temperature is changed.

Both chemical and physical properties of water change with a temperature change.

Solution

Question 8

solid

liquid

gas

none of these

Solution

Question 9

I

II

III

All of the above

Solution

Question 10

Strong intermolecular forces.

Weak intermolecular forces.

Non existing intermolecular forces.

Either A or C

Solution

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