Air around Us Test

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Air around Us Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Carbon exists in the atmosphere in the form of:

A
carbon monoxide only

B
carbon monoxide in traces and carbon dioxide

C
carbon dioxide only

D
coal

Solution

Carbon dioxide is a major component in the atmosphere (0.03%) and carbon monoxide is present in trace amounts.
Question 2
1 / -0

The pie chart shows the composition of air. Identify the gases W, X, Y.

A
Nitrogen - Rare gases - Oxygen

B
Carbon - Oxygen - Rare gases

C
Nitrogen - Oxygen - Rare gases

D
Rare gases - Hydrogen - Oxygen

Solution

Air is a mixture of gases - 78% nitrogen and 21% oxygen - with traces of water vapour, carbon dioxide, argon, and various other components.
In the pie chart, the gases W, X, Y are Nitrogen, Oxygen, rare gases respectively.
Question 3
1 / -0

Air has________ composition with________ oxygen at high attitudes.

A
fixed, less

B
variable, less

C
variable, more

D
fixed, more

Solution

Air has fixed composition with less oxygen at high altitudes. Air contains 78% nitrogen and 21% oxygen and less than 1% He, Ar, Ne and water vapour content.

This composition remains fixed at all locations but the oxygen becomes less dense at high altitudes so it is difficult to breathe in such low concentration of air.

Hence, option A is correct.
Question 4
1 / -0

John finds that, as he blows air into a balloon, it becomes bigger. What inference can John make?

A
Air is a gas.

B
Air has mass

C
Air is matter

D
Air occupies space

Solution

When a balloon is filled with air then the air exerts force on the walls of the balloon. Due to this force the balloon material stretches and hence size of balloon increases.
Question 5
1 / -0

It is not proper to breathe through our mouth because:

A
the dust particles would enter our bodies

B
more carbon dioxide will be inhaled

C
our throat will become sore

D
we will catch cold easily

Solution

It is not proper to breathe through our mouth because most of the dust particles can enter our body along with the air we breathe in. But breathing through nose does not allow to enter dust because nose has hair present which traps the dust particles.
Question 6
1 / -0

The correct ascending order of gases as per their composition in air is:

A
oxygen < carbon dioxide < nitrogen

B
hydrogen < oxygen < nitrogen

C
nitrogen < hydrogen < oxygen

D
oxygen < carbon dioxide < hydrogen

Solution

By volume dry air contains $$78.09\%$$ Nitrogen, $$20.95\%$$ Oxygen, $$0.93\%$$ Argon, $$0.03\%$$ Carbon dioxide and small traces of other gases. There is a small amount of hydrogen gas in the Earth's atmosphere; it makes up less than one part per million.
Ascending order of gases as per their composition in air is:
Hydrogen $$<$$ Oxygen $$<$$ Nitrogen
Question 7
1 / -0

Which one of the following gas does not form a part of the atmosphere?

A
Nitrogen

B
Chlorine

C
Carbon dioxide

D
Oxygen

Solution

Nitrogen $$(N_2)- 78 \% \ of \ air$$, Carbon dioxide $$(CO_2)- 0.04 \%\ of \ air$$ and Oxygen$$(O_2)- 21 \% \ of \ air$$ are a part of the atmosphere but chlorine $$(Cl_2)$$ does not form a part of the atmosphere.
Question 8
1 / -0

__________ is the most abundant gas in the atmosphere.

A
Carbon dioxide

B
Oxygen

C
Nitrogen

D
None of the above

Solution

Nitrogen (78%) and oxygen (21%) are two gases that make up the bulk of the atmosphere. Carbon dioxide, helium, ozone, argon and water vapour make up 1% of the rest of the atmosphere. Carbon monoxide is not a part of our atmosphere.
Question 9
1 / -0

Glass panes usually appear hazy because:

A
water vapour settling on the tiny dust particles.

B
it is the property of transparent substances.

C
they are old.

D
None of these

Solution

Air contains some gases, water vapours, and dust particles that stick to transparent glass panes and settle down which lead to a hazy appearance.

Hence, option $$A$$ is correct.
Question 10
1 / -0

Choose the option which justifies the given statement:-
Air is considered a mixture, not a compound.

A
It is possible to separate air into its constituent gases by physical methods like fractional distillation.

B
Air does not have a fixed formula like compounds.

C
Air shows properties same as the constituent gases present in it.

D
All of the above

Solution

Air is considered as mixture of many gases because air doesnot have fixed formula like compounds. Also it doesnot show property same as the constituent gases present in it. And it's component can be separated into its constituent gases by physical methods like fractional distillation. So all of the above statement conclude that air is mixture.

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Re-Attempt Weekly Quiz Competition

Air around Us Test - 5

Result

Air around Us Test - 5

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SHARING IS CARING

Question 1

carbon monoxide only

carbon monoxide in traces and carbon dioxide

carbon dioxide only

coal

Solution

Question 2

Nitrogen - Rare gases - Oxygen

Carbon - Oxygen - Rare gases

Nitrogen - Oxygen - Rare gases

Rare gases - Hydrogen - Oxygen

Solution

Question 3

fixed, less

variable, less

variable, more

fixed, more

Solution

Question 4

Air is a gas.

Air has mass

Air is matter

Air occupies space

Solution

Question 5

the dust particles would enter our bodies

more carbon dioxide will be inhaled

our throat will become sore

we will catch cold easily

Solution

Question 6

oxygen < carbon dioxide < nitrogen

hydrogen < oxygen < nitrogen

nitrogen < hydrogen < oxygen

oxygen < carbon dioxide < hydrogen

Solution

Question 7

Nitrogen

Chlorine

Carbon dioxide

Oxygen

Solution

Question 8

Carbon dioxide

Oxygen

Nitrogen

None of the above

Solution

Question 9

water vapour settling on the tiny dust particles.

it is the property of transparent substances.

they are old.

None of these

Solution

Question 10

It is possible to separate air into its constituent gases by physical methods like fractional distillation.

Air does not have a fixed formula like compounds.

Air shows properties same as the constituent gases present in it.

All of the above

Solution

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