6th Grade > Chemistry
AIR AROUND US MCQs
Total Questions : 100
| Page 2 of 10 pages
Answer: Option B. -> False
:
B
The percentage of oxygen in the airis same at sea level as it is at high altitudes, which is around 21%. However, at high altitudes the pressure is lower and air is more spread out. This leadsto less oxygen availability for the body in each breathe.
:
B
The percentage of oxygen in the airis same at sea level as it is at high altitudes, which is around 21%. However, at high altitudes the pressure is lower and air is more spread out. This leadsto less oxygen availability for the body in each breathe.
Answer: Option C. -> Driving a car
:
C
Rustling of leaves, flying of kite and moving blades of a windmill are the events that occur due to the movement of air. While for driving a car,movement of air is not required.
:
C
Rustling of leaves, flying of kite and moving blades of a windmill are the events that occur due to the movement of air. While for driving a car,movement of air is not required.
Answer: Option B. -> oxygen
:
B
During respiration, plants absorb oxygen, break down their food and release carbon dioxide.
Oxygen + Glucose→ Carbon dioxide + Water + Heat energy
:
B
During respiration, plants absorb oxygen, break down their food and release carbon dioxide.
Oxygen + Glucose→ Carbon dioxide + Water + Heat energy
Answer: Option C. -> Air contains water vapour.
:
C
Air is a mixture of many gases. It also contains a small percentage of water vapour (gaseous state of water). When the water vapour present in the air comes in contact with the tumbler containing cold water, it condenses to form tiny droplets on the outer surface of the tumbler.
:
C
Air is a mixture of many gases. It also contains a small percentage of water vapour (gaseous state of water). When the water vapour present in the air comes in contact with the tumbler containing cold water, it condenses to form tiny droplets on the outer surface of the tumbler.
Answer: Option A. -> True
:
A
Air is present inside water in dissolved state. It is because of this that aquatic species are able to breathe inside water.
:
A
Air is present inside water in dissolved state. It is because of this that aquatic species are able to breathe inside water.
Answer: Option A. -> True
:
A
Air consists ofoxygen which assists burning. Oxygen is necessary for burning of every substance.
:
A
Air consists ofoxygen which assists burning. Oxygen is necessary for burning of every substance.
Answer: Option A. -> carbon dioxide, oxygen
:
A
The process by which the plant leaves absorb carbon dioxide to produce glucose (sugar) and oxygen is called photosynthesis. Photosynthesis happens in the presence of sunlight.
Carbon dioxide + Water sunlight→ Sugar + Oxygen.
:
A
The process by which the plant leaves absorb carbon dioxide to produce glucose (sugar) and oxygen is called photosynthesis. Photosynthesis happens in the presence of sunlight.
Carbon dioxide + Water sunlight→ Sugar + Oxygen.
Answer: Option C. -> Vacuum
:
C
A vacuum is a space where there is no matter. Even, the air is not present in it. Therefore, the air is present everywhere except in a vacuum.
:
C
A vacuum is a space where there is no matter. Even, the air is not present in it. Therefore, the air is present everywhere except in a vacuum.
Answer: Option B. -> False
:
B
Air consists ofoxygen which assists burning. Oxygen is necessary for burning of everything.
:
B
Air consists ofoxygen which assists burning. Oxygen is necessary for burning of everything.
Answer: Option C. -> Statement I is true and statement II is false
:
C
The percentage of oxygen in airis the same at sea level as it is at high altitudes, which is around 21%. However, at high altitudes the pressure is lower and air is more spread out leading to less oxygen availbility for ourbody. Hence, mountaineers carry oxygen cylinders with them while climbing high mountains.
:
C
The percentage of oxygen in airis the same at sea level as it is at high altitudes, which is around 21%. However, at high altitudes the pressure is lower and air is more spread out leading to less oxygen availbility for ourbody. Hence, mountaineers carry oxygen cylinders with them while climbing high mountains.
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