CBES Board Class 10 MCQ Quiz Hub

1. How much cooler does the air get for every 1 km increase in altitude in the troposphere?
2 degrees
6.5 degrees
8 degrees
10 degrees

2. Which of the following is produced when electrical discharges pass through oxygen in the air?
chlorofluorocarbons
methane
ozone
lead compounds

3. What is the source of lead compounds?
aerosol sprays foams
exhaust fumes of motor vehicles
incomplete burning of wood
none of above

4. The atmosphere is divided into how many layers?
Two
Three
four
Five

5. How much higher can be the temperature inside a greenhouse as compared to the outside?
20 °C higher
10 °C to 15 °C higher
5 °C higher
25 °C higher

6. The outer layer of the thermosphere is
ionosphere
exosphere
mesosphere
stratosphere

7. Minimum temperature of the troposphere is
17 °C
−55 °C
−5 °C
1800 °C

8. The temperature of the outer mesosphere is
93 °C
−93 °C
;5 °C
−5 °C

9. If silk clothes are left in the open air for a week or so, their color fades because of
sulphur dioxide is converted into sulphur trioxide
dirt
carbon monoxide
nitrogen oxides

10. Height of thermosphere is
50 Km
80 Km
above 80 Km
30 Km

11. Percentage of hydrogen in the air is
0.99
0.8
0.5
0.25

12. Which of the following have an impact on brain development in human beings especially among children?
chlorofluorocarbons (CFCs)
methane
carbon monoxide
lead compounds

13. Which of the following is true about ozone?
light blue in colour
odourless
not harmful
not a pollutant

14. Which of the following is a powerful irritant which can aggravate the symptoms of people who suffer from respiratory disorders?
sulphur dioxide
carbon monoxide
oxides of nitrogen
carbon dioxide

15. What is meant by the term 'meso'?
top
middle
turning
changing

16. Which of the following is further divided into two layers?
troposphere
stratosphere
mesosphere
thermosphere

17. Group of chemically unreactive compounds that are commonly used as solvents are called
chlorofluorocarbons (CFCs)
functional groups
alkyl groups
lead compounds

18. Which of the following is produced when dead plant material decays in the absence of air? methane carbon monoxide
chlorofluorocarbons (CFCs)
methane
carbon monoxide
lead compounds

19. Which two main gases are produced when you burn a piece of wood?
oxygen and nitrogen
carbon dioxide and oxygen
carbon dioxide and carbon monoxide
carbon dioxide and nitrogen

20. The occurrence of weather is in
troposphere
stratosphere
mesosphere
thermosphere

21. The thermosphere is divided into how many layers?
Two
Three
four
Five

22. What is the color of nitrogen dioxide?
colorless
pink
brown
reddish brown

23. Which of the following is not true about carbon monoxide?
it is poisonous
it is insoluble in water
it is an air pollutant
it can cause death

24. Which of the following is true about sulfur dioxide?
it is colorless
it is odourless
it is not an air pollutant
it does not cause breathing difficulties

25. Height of troposphere is
10 Km
12 Km
50 Km
80 Km

26. Height of troposphere is
10 Km
12 Km
50 Km
80 Km

27. The lower layer of the thermosphere is
ionosphere
exosphere
mesosphere
stratosphere

28. Which of the following is true about nitrogen dioxide?
it is colorless
it is odourless
it is soluble in water
it is soluble in oxygen

29. What is the term used for the envelope of gases and water vapor surrounding the planet earth?
air
atmosphere
environment
biome

30. Which of the following has the lowest percentage in the air?
krypton
argon
hydrogen
helium

31. Which of the following is responsible for the rise in temperature in the stratosphere?
position of stratosphere
height of stratosphere
ozone
sunlight

32. Which of the following is true about carbon monoxide?
it is poisonous
it is insoluble in water
it is not an air pollutant
it cannot cause death

33. Which of the following is true about carbon monoxide?
it is poisonous
it is insoluble in water
it is not an air pollutant
it cannot cause death

34. Which of the following is not true about sulfur dioxide?
it is colorless
it is odourless
it is an air pollutant
it causes breathing difficulties

35. Which of the following is not true about nitrogen dioxide?
it is reddish brown
it has pungent odor
it is insoluble in water
it is toxic

36. An allotropic form of oxygen comprising three oxygen atoms is called
ozone
oxidation
oxidizing agent
reducing agent

37. Which of the following is true about incineration?
it consumes all combustible materials
it is a clean process
it does not produce air pollution
it does not generate odor

38. Formation of most of the clouds is in
troposphere
stratosphere
mesosphere
thermosphere

39. Height of stratosphere is
0-12 Km
12-50 Km
50-80 Km
above 80 Km

40. Which of the following is the second layer of atmosphere as one moves upwards from the Earth's surface?
troposphere
stratosphere
mesosphere
thermosphere

41. What is meant by the term 'tropo'?
top
first
high
turning

42. Ozone formation and destruction are powered by
oxygen gas
atomic oxygen
ultraviolet radiation
chlorine gas

43. Majority of the UV rays are screened out by
oxygen
nitrogen
ozone
carbon

44. Which of the following comes mainly due to the combustion of fuel used in motor vehicles?
chlorofluorocarbons (CFCs)
methane
carbon monoxide
lead compounds

45. Which of the following causes headache and dizziness and can even cause death if inhaled for a long time?
sulphur dioxide
carbon dioxide
nitrogen dioxide
carbon monoxide

46. Anything that destroys some part of the environment is called
dirt
virus
pollutant
bacteria

47. Which of the following is an excellent heat absorber and causes global warming?
chlorofluorocarbons (CFCs)
methane
carbon monoxide
lead compounds

48. Which of the following is the Third layer of atmosphere as one moves upwards from the Earth's surface?
troposphere
stratosphere
mesosphere
thermosphere

49. Which of the following is the fourth layer of atmosphere as one moves upwards from the Earth's surface?
troposphere
stratosphere
mesosphere
thermosphere

50. The pH of normal rainwater is
4
5
5.6
6.6

51. Approximately, what percentage of water vapor is contained by the air in the tropical rain forest?
0.01
0.02
0.03
0.04