How Crucial Is Air and Water

Q.

42. Which of the following does not cause air pollution?

1. Plants

2. Cool engines

3. Vehicles

4. Burning leaves

Q.

Which of the following is the most important thing for survival of living organisms?

1. Fabric

2. Air

3. Water

4. Food

Q. Cleaner fuels that should be used by industries and automobiles are:

1. Wood
2. LPG
3. CNG
4. Coal

Q. A- The use of chlorofluorocarbons has now been banned.
B- Chlorofluorocarbons are responsible for the depletion of ozone layer of the atmosphere.
C- Chlorofluorocarbons absorb the harmful UV radiations of the sun.

Which of the given statements is the correct reason of another statement?

1. C is the correct reason of A
2. A is the correct reason of B
3. B is the correct reason of A
4. A is the correct reason of C

Q.

Question 1
Air is a mixture of various gases. One of the gases constitutes 21% part of the air and is essential for the survival of human beings. This gas is:
(a) Nitrogen
(b) Oxygen
(c) Ozone
(d) Argon

Q. Green fuel is:-

1. Leaded petrol
2. Unleaded petrol
3. Gasohol
4. Low sulphur diesel

Q. Match Column-I with Column-II and select the correct answer.
$\begin{array}{cc}ColumnI& ColumnII\\ A.Helium& P.Growthofplantsandanimals\\ B.Nitrogen& Q.Signboards\\ C.Neon& R.Weatherballoons\\ D.Argon& S.Electricbulbs\end{array}$

1. A-S, B-Q, C-R, D-P
2. A-R, B-P, C-Q, D-S
3. A-S, B-R, C-Q, D-P
4. A-Q, B-P, C-S, D-R

Q. Which of the following is the most abundant gas in the Earth's atmosphere?

1. Hydrogen
2. Nitrogen
3. Oxygen
4. Argon

Q.

Which of the following are essential for sustaining human life?

1. Water, food and clothes

2. Land, air and clothes

3. Water, land and clothes

4. Air, water and food

Q. Which one of the following statements best describes “jet streams”?

1. Wind blowing from subtropical high-pressure belts towards the tropical low-pressure belts
2. Narrow meandering bands of winds which blow in mid-latitude near the tropopause and encircle the globe
3. Winds blowing from the tropical high-pressure belts towards the equatorial low-pressure belts.
4. Wind system with seas and reversal of direction

Q. Which one of the following statements best describes “jet streams”?

1. Wind system with seas and reversal of direction
2. Wind blowing from subtropical high-pressure belts towards the tropical low-pressure belts
3. Narrow meandering bands of winds which blow in mid-latitude near the tropopause and encircle the globe
4. Winds blowing from the tropical high-pressure belts towards the equatorial low-pressure belts.

Q.

Which of the following is the most important thing for survival of living organisms?

1. Food

2. Fabric

3. Water

4. Air

Q.

Which of the following represents the correct composition of air by volume?

1. Nitrogen - 21%, oxygen - 78% and other gases such as carbon dioxide, argon, methane, ozone and water vapour are present in small quantities.

2. Nitrogen - 60%, oxygen - 38% and other gases such as carbon dioxide, argon, methane, ozone and water vapour are present in small quantities.

3. Nitrogen - 21%, oxygen - 78% and other gases such as carbon dioxide, argon, methane, ozone and water vapour are present in small quantities.

4. ​Nitrogen - 38%, oxygen - 60% and other gases such as carbon dioxide, argon, methane, ozone and water vapour are present in small quantities.