PHYSICAL SCIENCE NOTES | CHAPTER - 1 | PDF DOWNLOAD | Chapter 1 | Class 10 | Concerns about our Environment | West Bengal Board | PDF Download | Madhyamik Examination 2022 | Edwise Coaching Classes
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FOR SHORT AND MCQ
(1 MARK)
1. Which layer of the
atmosphere contains cloud, rain and snow?
Ans: Troposphere.
2. Which layer of the
atmosphere contains most of the mass?
Ans: Troposphere.
3. In which layer of
the atmosphere weather and climatic change takes place?
Ans: Troposphere.
4. In which layer of
the atmosphere photochemical smoke forms?
Ans: Troposphere.
5. Where is the altitude of troposphere
maximum?
Ans: At Equator (16 KM).
6. What is the layer
between troposphere and stratosphere called?
Ans: Troposphere.
7. Which layer of
atmosphere is suitable for Jet plane?
Ans: Stratosphere.
8. Which layer has
suitable weather and climatic condition?
Ans: Stratosphere.
9. Which layer contains
most of the ozone gas?
Ans: Ozonosphere.
10. Which layer absorbs
UV radiation from the Sun?
Ans: Ozone.
11. Which is the coldest layer of the atmosphere?
Ans: Mesosphere (up to -90 Degree C)
12. In which layer of
the atmosphere asteroids are destroyed?
Ans: Mesosphere.
13. Which gas is mostly
responsible for ozone depletion?
Ans: CFCs.
14. Which atom produced
from CFC can destroy Ozone molecule?
Ans: Chlorine atom.
15. Which layer of the
atmosphere is the hottest?
Ans: Thermosphere.
16. Which layer of the atmosphere absorbs UV and the X-ray radiation from the Sun?
Ans: Thermosphere.
17. Which layer of the
atmosphere reflects radio waves?
Ans: Ionosphere.
18. In which layer of
the atmosphere molecules are found in ionized state?
Ans: Ionosphere.
19. In which layer of
the atmosphere temperature decreases as we go up? [MP 2017]
Ans: Troposphere.
20. What is the rate of
decrease in temperature in troposphere?
Ans: 6.4 Degree Celsius /1000 m or 1 Degree Celsius /165 m.
21. In which layer of
the atmosphere temperature increases with altitude?
Ans: Stratosphere.
22. In which layer of
the atmosphere Auroras are seen?
Ans: Thermosphere.
23. Which oxide of
Nitrogen can destroy ozone?
Ans: NO and NO2.
24. Which oxide of nitrogen is produced by jet engines?
Ans: NO.
25. Which oxide of Nitrogen produced during
lightening?
Ans: NO.
26. Which is the most important Greenhouse gas?
Ans: CO2.
27. Name some
Greenhouse gases.
Ans: CO2, CH4, CFC, water vapour.
28. What is the unit of
calorific value of fuel? [MP 2019]
Ans: Kg/J
(Kilogram/Joule)
29. Which fuel has the
highest calorific value?
Ans: Hydrogen gas.
30. Which material has
lowest calorific value?
Ans: Solid fuel.
31. Which gas absorbs
infra radiation?
Ans: Methane, water vapour, CO2
32. The minimum amount
of energy required to burn fuel is known as –
Ans: Combustion
heat.
33. Give some examples of alternative source of
energy.
Ans: Solar energy,
wind energy, tidal energy.
34. In large cities
solid waste are used to produce which kind of energy?
Ans: Electricity.
35. What is the main
constituent of biogas?
Ans: Methane.
36. Which energy is
produced using geothermal energy?
Ans: Electricity.
37. Natural gas is a
mixture of-
Ans: Methane and Ethane.
38. Give some examples of non-conventional source of energy?
Ans: Wind energy, Solar energy, Tidal energy.
40. Which greenhouse
gas does not deplete ozone layer? [MP 2020]
Ans: CO2.
41. Which fuel gas is
harvested from coal-bed? [MP 2020]
Ans: Methane.
42. Name a gas present
in air, the increase in amount of which causes global warming. [MP 2020]
Ans: CO2, CH4.
43. Which gas absorbs
long wavelength infrared radiation emitted from the earth’s surface? [MP 2019]
Ans: N2
44. Does the
temperature increase or decrease with increase in altitude in stratosphere? [MP
2019]
Ans: Increases.
45. Mention one harmful
effect of global warming. [MP 2017]
Ans: Receding of glaciers and consequent increase in sea
level.
46. Which greenhouse
gas has the maximum contribution towards global warming? [MP 2018]
Ans: CO2
47. Mention one use of
bio-gas? [MP 2018]
Ans: It is used as fuel.
48. What is the role of
NO in the decomposition of ozone layer? [MP 2018]
Ans: Nitric Oxide, NO reacts with ozone to form nitrogen
dioxide, NO2 and O2 molecules.
FOR 2 AND 3 MARKS
1. Write with reason in which layer among the layers of the atmosphere the pressure is the highest? [MP 2020]
2. What is biomass?
3. What do you mean by sustainable development? [MP 2019]
4. What is Tropopause?
5.
What are the characteristics of stratosphere?
6.
Write a short note on Ozone layer.
7.
Write three characteristics of Thermosphere.
8.
What do you mean by Ozone hole?
9.
What are the causes of depletion of Ozone layer?
10.
What are the harmful effects of depletion of Ozone layer?
11.
What are greenhouse gases? Give example.
12.
What do you mean by greenhouse effect?
13.
What is Global warming?
14.
What are the main causes of Global warming?
15.
What are the effects of global warming?
16.
What preventing measures can be used to reduce global warming or Greenhouse
gas?
17.
What is conservation of energy?
18.
Why energy conservation is necessary?
19.
What are the uses of solar energy?
20.
How can Wind energy be utilized?
21.
Write two disadvantages of using solar energy?
22. How
is tidal energy utilized?
23.
What do you mean by geothermal energy? How is it used?
24.
What do you mean by bio-mass energy?
25.
What is bio-gas? What is its use?
26.
What is coal-bed Methane?
27.
What is methane hydrate? How it is use? [MP 2018]
28. How solid waste can be utilized?
29. What do you mean by calorific value of fuel? Between coal and diesel which gas has greater calorific value? [MP 2017]
Note - Mark Answers in your text book.
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