# 6th Class Science Air Around us Question Bank

### done Air Around us

• A) Air is present everywhere

B) We can feel air

C) Both the above

D) None of these

• A) The moving air is called wind.

B) We can find the direction in which air is moving at a place.

C) Weather cock is used to find the direction in which air is moving at a particular place.

D) All of the above

• A) Air is a mixture of many gases

B) Air is a homogeneous mixture

C) Air is a pure substance

D) Only (a) and (b) are correct

• A) In air percentage of nitrogen by volume is77%

B) In air percentage of oxygen by volume is20%

C) In air percentage of carbon dioxide is only2.0%

D) In air percentage of water and argon is 1.0%

• A) Air is not a matter as it cannot be seen

B) Air is incompressible

C) Air exerts pressure

D) All of the above

• A) The percentage of oxygen in air inhaled and exhaled by us remains same

B) Plants use more of oxygen in respiration and produce no oxygen in any of its processes

C) Plants do not need oxygen for respiration

D) All of the above

• A) The planet earth is surrounded by a thin layer of air.

B) The thin layer of air that surrounds earth extends only up to two kilometres below the surface of earth.

C) This thin layer of air that surrounds ear this no importance for living beings.

D) All of the above

• A) The percentage of nitrogen in air varies from place to place on the earth.

B) The percentage of oxygen in air varies from place to place on the earth.

C) Both the above are correct

D) All of the above

• A) The animals that live under water cannot use the atmospheric air for their respiration.

B) The aquatic animals do not need air for respiration.

C) The aquatic animals use carbon dioxide dissolved in water for their respiration.

D) All the above are incorrect.

• A) Carbon dioxide is a colourless gas

B) Oxygen is an odorless gas

C) Air contains both oxygen and carbon dioxide

D) All of the above

• A) Plants and animals are interdependent.

B) Plants and animals depend on each other for exchange of oxygen.

C) Plants and animals depend on each other for exchange of carbon dioxide.

D) All of the above

• A) Smoke contains suspended solid particles

B) Smoke is generally harmful

C) Both the above are correct

D) None of the above

• A) We cannot observe the presence of dust particles in air

B) Amount of dust particles in air vary from time to time

C) Both the above are correct

D) All of the above

• A) it loosens the soil and allows the air to enter into the spaces between soil particles

B) the sprouting seed will be able to use the trapped air

C) plants will absorb some air through their roots and also take in water and minerals from the soil

D) All of the above

• A) Plants consume more oxygen and produce less oxygen.

B) Plants consume less oxygen and produce more oxygen.

C) Plants consume the same amount of oxygen as they produce.

D) Plants consume a large amount of oxygen during photosynthesis and produce a large amount of carbon dioxide during photo-synthesis.

• A) We make use of wind energy to rotate a wind mill

B) Windmill is used to generate electricity

C) Windmill is used to run flour mills

D) All of the above

• A) Air plays an important role in water cycle.

B) Birds can fly due to presence of air.

C) Both the above are correct

D) None of these

• A) Nitrogen

B) Carbon monoxide

C) Carbon dioxide

D) None of these

• A) air occupies space

B) air contains dust particles

C) water vapours are present in air

D) air has mass

• A) Nitrogen

B) Oxygen

C) Carbon dioxide

D) Other gases

• A) Nitrogen

B) Oxygen

C) Carbon dioxide

D) Other gases

• A) Hydrogen

B) Oxygen

C) Nitrogen

D) Carbon dioxide

• A) Air contains dust, water vapour and smoke.

B) Ozone depletion causes skin cancer.

C) Acid rain is caused due to air pollution.

D) None of these

• A) Air helps in pollination and in dispersal of seeds.

B) Air becomes denser as we go on mountains.

C) Air does not contain dust particles.

D) Water contains dissolved carbon dioxide.

• A) Planting more trees on roadsides

B) Using CNG in vehicles

C) Reducing the number of vehicles

D) All of the above

• A) Oxygen

B) Carbon dioxide

C) Ozone

D) Nitrogen

• A) Only (ii) is correct

B) Both (i) and (iii)

C) Only (i) is incorrect

D) Only (iii) is correct

• A) Oxygen

B) Nitrogen

C) Water vapours

D) Hydrogen

• A) Dissolved nitrogen

B) Dissolved oxygen

C) Dissolved air

D) None of these

• A) So as to locate the factories easily.

B) To take the harmful smoke and gases away from us.

C) To absorb the dust particles present in smoke before being released to the atmosphere.

D) All of the above

• A) They come out of soil so as to stay at some dry place.

B) They come out of soil for respiration.

C) They come out to see the nature when it is raining heavily.

D) None of the above

• A) They consume oxygen for respiration.

B) They consume oxygen for photosynthesis.

C) They produce more oxygen during photo-synthesis as compared to that they consume for respiration.

D) All of the above

•  Column-I (Name of gas in Air) Column-II (% age of gas in air) A. Oxygen (p) 20% B. Nitrogen (q) 79% C. Carbon dioxide (r) 0.04% D. Other gases (s) Less than 1%

A) $A\to (p);B\to (q);C\to (r);D\to (s)$

B) $A\to (q);B\to (p);C\to (r);D\to (s)$

C) $A\to (p);B\to (q);C\to (s);D\to (r)$

D) $A\to (q);B\to (p);C\to (s);D\to (r)$

•  Column-I Column-II A. Nitrogen (p) Produced when fuel is burnt B. Oxygen (q) Supporter of combustion C. Carbon dioxide (r) Not a supporter of combustion D. Smoke (s) Colourless, odourless gas that may cause suffocation

A) $A\to (p);B\to (q);C\to (r);D\to (s)$

B) $A\to (q);B\to (r);C\to (s);D\to (p)$

C) $A\to (r);B\to (q);C\to (s);D\to (p)$

D) $A\to (s);B\to (q);C\to (p);D\to (r)$

•  Column-I Column-II A. Oxygen (p) Consumed by plants and animals during photosynthesis B. Carbon dioxide (q) Produced by animals during respiration C. Atmosphere (r) Animals that live under water D. Aquatic animals (s) Thin layer of air that surrounds the earth

A) $A\to (p);B\to (q);C\to (r);D\to (s)$

B) $A\to (q);B\to (p);C\to (s);D\to (r)$

C) $A\to (p);B\to (q);C\to (s);D\to (r)$

D) $A\to (q);B\to (p);C\to (r);D\to (s)$

• A) a mixture of liquids

B) a mixture of liquid and gases

C) a mixture of gases

D) None of these

• A) contains gases and solids

B) contains gases and liquids

C) contains no solid or liquid

D) All of the above

• A) Water is present in air in vapour form

B) Water is not present in air

C) Water is present in air in liquid form

D) Water is present in air in solid form

• A) The air surrounds the earth.

B) The thin layer of air that surrounds the earth extends only upto 2 kilometres above the surface of earth.

C) The thin layer of air that surrounds the earth extends upto 2 kms below the surface of earth.

D) All of the above are correct.

• A) Atmosphere is essential for plants.

B) Atmosphere is essential for human beings.

C) Atmosphere is essential for life.

D) None of these

• A) Atmosphere is the envelope of air that surrounds the earth.

B) Atmospheric gases contain nitrogen and oxygen.

C) Both the above are correct.

D) None of these

• A) Oxygen

B) Nitrogen

C) Carbon dioxide

D) All of these

• A) Oxygen

B) Nitrogen

C) Carbon dioxide

D) None of these

• A) Oxygen

B) Nitrogen

C) Carbondioxide

D) All of these

• A) Both A and R are true and R is the correct explanation of A.

B) Both A and R are true but R is not the correct explanation of A.

C) A is true but R is false.

D) A is false but R is true.

• A) Both A and R are true and R is the correct explanation of A.

B) Both A and R are true but R is not the correct explanation of A.

C) A is true but R is false.

D) A is false but R is true.

• A) Both A and R are true and R is the correct explanation of A.

B) Both A and R are true but R is not the correct explanation of A.

C) A is true but R is false.

D) A is false but R is true.

• A) Both A and R are true and R is the correct explanation of A.

B) Both A and R are true but R is not the correct explanation of A.

C) A is true but R is false.

D) A is false but R is true.

• A) Both A and R are true and R is the correct explanation of A.

B) Both A and R are true but R is not the correct explanation of A.

C) A is true but R is false.

D) A is false but R is true.

• A) air

B) oxygen

C) nitrogen

D) carbon dioxide

• A) (i)only

B) (ii) only

C) (i), (ii) and (iii)

D) and (ii) only

• A) $\frac{2}{3}$part is nitrogen and $\frac{1}{3}$rd part is oxygen
B) $\frac{3}{4}$part is oxygen and$\frac{1}{4}$ part is nitrogen
C) $\frac{1}{2}$part is oxygen and$\frac{1}{2}$ part is nitrogen and other
D) $\frac{1}{5}$part is oxygen and $\frac{4}{5}$part is nitrogen and other gases.