Uses of Components of Air

Q.

What elements do we use in everyday life?

Q. Which of the following gas is used in fire extinguisher?

1. Oxygen
2. Carbon dioxide
3. Helium
4. Hydrogen

Q. What is the importance of air?

1. It provides oxygen for breathing
2. It provides carbon dioxide for photosynthesis
3. Water vapour present in air provides moisture
4. All of these

Q. The gas used in advertising sign lamps is:

1. helium
2. neon
3. argon
4. krypton

Q.

Is biosphere reserve in situ Conservation?

Q. ______ is used in flash photography.

1. Helium
2. Neon
3. Krypton
4. Xenon

Q. The gas which is necessary for respiration is ______.

1. sulphur dioxide
2. oxygen
3. hydrogen
4. nitrogen

Q.

Which gas is used for extinguishing flames? How does it work? [3 MARKS]

Q. If a burning candle is placed inside a closed glass jar, the candle gets extinguished after some time. This is caused due to the absence of ______.

1. carbon dioxide
2. argon
3. hydrogen
4. oxygen

Q.

Write the name of two constituent of troposphere.

Q.

Radon is used for decorative lights. True or false.

1. True
2. False

Q. The mountaineers carry oxygen cylinders with them while climbing mountains because the availability of air ______ as we go up in the atmosphere.​

1. increases​
2. decreases​
3. stays the same​

Q. Why does all weather phenomena take place in the troposphere?

Q.

Which one of the following statements is true about a biosphere reserve?

1. It is a protected area where only endemic species live.

2. It is meant only for the conservation of plants and animals.

3. It is meant to conserve both the biodiversity and the culture of that area.

4. There are no other protected areas within its limits.

Q.

Kenneth explained about the most important component of air to John and Sam. John was satisfied with the answer but Sam wanted to add some more information to it. Sam further elaborated the properties of the most important component of air. He said, it is not only used by living organisms during respiration but it also supports_____________.

1. Evaporation

2. Distillation

3. Condensation

4. Combustion

Q. Fish do not breathe in oxygen.

1. False
2. True

Q. Which of the following gas is used to fill the packets of potato chips?

1. Oxygen
2. Nitrogen
3. Carbon dioxide
4. Hydrogen

Q. The part of atmosphere which is consists of variable gasses with unknown composition is called ____________.

1. Stratosphere
2. Hetrosphere
3. Homosphere
4. None of these

Q. Aquatic animals breathe in oxygen present in water bodies.

1. False
2. True

Q. What is fire extinguisher ? Name two types of fire extinguishers and state one use of each.

Q. What will happen if you place a cup on an inclined surface in space?

1. It will slide along the surface
2. It will rise perpendicular to the plane of the inclined surface
3. It will rise up vertically
4. It will remain stationary at its position

Q. During photosynthesis plants give out .

1. oxygen
2. nitrogen
3. carbon dioxide

Q.

Which of the following layers of atmosphere absorb UV light radiations?

1. Ozonosphere
2. Ionosphere
3. Troposphere
4. None of these

Q. How many biosphere reverses have been set up in the country to protect flora and fauna?

1. Fifteen
2. Sixteen
3. Seventeen
4. Fourteen

Q.

The most abundant constituent of air is _____.

1. Oxygen

2. Nitrogen

3. Impurities

4. Water vapour

Q.

All flames produce smoke.

1. Only Statement-1 is True

2. Only Statement-2 is True

Q. Air is soluble in water.

1. True
2. False

Q. The gas which is necessary for respiration is ______.

1. sulphur dioxide
2. oxygen
3. hydrogen
4. nitrogen

Q. The gas which is necessary for respiration is ______.

1. sulphur dioxide
2. oxygen
3. hydrogen
4. nitrogen

Q.

13 Where is the ozone layer found?

1. troposphere

2. thermosphere

3. exosphere

4. stratosphere