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Chemistry Class 10 Chapter 6


Updated: 15 Dec 2023

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Chemistry Class 10 Chapter 6 introduces the concept of “Environmental Chemistry I: Atmosphere”. This is mainly chapter No. 14, “Environmental Chemistry I: Atmosphere”, of the book of Class 10.
This article consists of Notes, SLO Based Notes and MCQs of chemistry, which cover your course, board papers and clear your chemistry concept for different types of tests.

Chemistry Class 10 Chapter 6 Notes

Environmental Chemistry I: Atmosphere

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Chemistry Class 10 Chapter No. 14 Notes

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SLO Base Questions

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Chemistry Class 10 Chapter No. 14 SLO Questions

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Chemistry Class 10 Chapter 6 MCQs

1. About 4.5 billion year ago, the earth at the time of its formation was a hot mass, which could not sustain.
(a) life
(b) Metals
(c) Pressure
(d) Matter
Show Answer

life


2. The earth than cooled gradually and due to of steam into water, formation of atmospheric gases and ozone layer in atmosphere made earth suitable for life .
(a) Evaporation
(b) Condensation
(c) Boiling point
(d) Melting point
Show Answer

Condensation


3. The branch of chemistry which deal with the study of environment and change occurring in it is called —–chemistry
(a) Physical
(b) Organic
(c) Environmental
(d) None of these
Show Answer

Environmental


4. The thick protective blanket of gases around the earth which helps to sustain life is called ——.
(a) Atmosphere
(b) Biosphere
(c) geosphere
(d) None of these
Show Answer

Atmosphere


5. The major constituents of atmosphere are ——–
(a) CO_2, CH_4
(b) N_2, O_2
(c) N_2, CH_4
(d) None of these
Show Answer

N_2, O_2

To Download Complete Notes of Chemistry Notes 10 Class, Click on the given link.

6. An increase in attitude wills—-the density of atmosphere.
(a) decrease
(b) increase
(c) constant
(d) None of these
Show Answer

decrease


7. Atmosphere is responsible for sustaining life on earth ,as it contain ________ which is necessary for living things.
(a) food
(b) oxygen
(c) Carbon dioxide
(d) None of these
Show Answer

oxygen


8 . Atmosphere also absorbs the dangerous ——-radiation coming from the sun and act as a protective layer
(a) Ultra violet
(b) cosmic
(c) Solar wind
(d) All of them
Show Answer

All of them


9. The atmospheric gases that are used in respiration and photosynthesis is called—-
(a) air
(b) oxygen
(c) Carbon dioxide
(d) None of these
Show Answer

air


10. The composition of atmosphere is—–
(a) Constant
(b) variable
(c) Equal
(d) None of these
Show Answer

variable


11. Atmosphere change according to time and ——-
(a) place
(b) pressure
(c) temperature
(d) None of these
Show Answer

place


12. Atmosphere is the mixture of different types of gases including—-
(a) Water vapours
(b) Dust particles
(c) both
(d) None of these
Show Answer

both


13. ——of atmosphere is made up of nitrogen and oxygen.
(a) 99%
(b) 95%
(c) 75%
(d) 90%
Show Answer

99%


14. The mass of atmosphere is approximately 4.5 to ______ metric tons.
(a) 5 \times 10^5
(b) 5 \times 10^{10}
(c) 5 \times 10^{15}
(d) 5 \times 10^{20}
Show Answer

5 \times 10^{15}


15. The density of atmosphere is——which gradually decrease with altitude.
(a) 0.0013 \ g/cm^3
(b) 0.0130 \ g/cm^3
(c) 1.03100 \ g/cm^3
(d) None of these
Show Answer

0.0013 \ g/cm^3


16. Generally atmosphere extends up to —–from earth’s g/cm^3
(a) 300 km
(b) 500 km
(c) 700 km
(d) None of these
Show Answer

500 km


17. The temperature of atmosphere decreases up to —-.
(a) -92 {}^o C
(b) -90 {}^o C
(c) -87 {}^o C
(d) -83 {}^o C
Show Answer

-92 {}^o C


18. The temperature of atmosphere increases up to——–
(a) 1500 {}^o C
(b) 1000 {}^o C
(c) 1200 {}^o C
(d) 800 {}^o C
Show Answer

1200 {}^o C


19. The pressure of atmosphere at sea level is —-but at high attitude it decreases.
(a) 5atm
(b) 1atm
(c) 10atm
(d) -3atm
Show Answer

1atm


20. There are the —–main layers of atmosphere.
(a) four
(b) five
(c) three
(d) six
Show Answer

four


21. The first layer of atmosphere which closest earth surface is called —–
(a) Mesosphere
(b) thermosphere
(c) troposphere
(d) None of these
Show Answer

troposphere


22. Tropo means —–
(a) change
(b) pungent
(c) colour
(d) None of these
Show Answer

change


23. We live in——.
(a) stratosphere
(b) troposphere
(c) mesosphere
(d) None of these
Show Answer

troposphere


24. The average height of troposphere from the earth s surface is about——.
(a) 5 km
(b) 8 km
(c) 11 km
(d) 31 km
Show Answer

11 km


25. Almost all of the dust particles and ——–are .present in this layer.
(a) Water vapours
(b) hydrogen
(c) krypton
(d) None of these
Show Answer

Water vapours


26. ——-of the atmosphere gases are present in this layer .
(a) 70-75%
(b) 50-55%
(c) 90-95%
(d) None of these
Show Answer

70-75%


27. The change and temperature of atmosphere with an increase with height is called—–
(a) Allotrope
(b) Lapse rate
(c) Change rate
(d) None of these
Show Answer

Lapse rate


28. The average temperature near the earth surface is ——-.
(a) 15 {}^o C
(b) 10 {}^o C
(c) 20 {}^o C
(d) 05 {}^o C
Show Answer

15 {}^o C


29. The average temperature at the top of the troposphere is about ——-
(a) -30 {}^o C
(b) -41 {}^o C
(c) -56 {}^o C
(d) -70 {}^o C
Show Answer

-56 {}^o C


30. Pressure, moisture, and density of air also —–with height.
(a) increase
(b) decrease
(c) constant
(d) None of these
Show Answer

decrease


31. The second layer of atmosphere which is above troposphere is called _____________.
(a) Stratosphere
(b) Mesosphere
(c) Exosphere
(d) Endosphere
Show Answer

Stratosphere


32. Strata is Greek word which means__________.
(a) Burn
(b) Above
(c) Spread out
(d) None of these
Show Answer

Spread out


33. Stratosphere stars at the top of troposphere and extends from 11km to _______above sea level.
(a) 25 km
(b) 39 km
(c) 50 km
(d) 57 km
Show Answer

50km


34. The major component of stratosphere is ____________.
(a) Ozone
(b) Oxygen
(c) Xenon
(d) Carbon dioxide
Show Answer

Ozone


35. The stratosphere contains the ozone layer at height of about.
(a) 18km
(b) 30km
(c) 42km
(d) 37 km
Show Answer

30km


36. Stratosphere is also called___________________.
(a) Ozonosphere
(b) Ionosphere
(c) Exosphere
(d) None of these
Show Answer

Ozonosphere


37. The stratosphere contains the ozone layer at a height of about.
(a) Decrease
(b) Constant
(c) increase
(d) None of these
Show Answer

increase


38. Which radiation breaks the ozone molecule into monotint and diatomic oxygen?
(a) CFCs
(b) UV-radiations
(c) HCFCs
(d) All of these
Show Answer

All of these


39. Weather balloons and jet air craft fly in _____as the air present in this layer is very thin.
(a) Stratosphere
(b) Mesosphere
(c) Troposphere
(d) None of these
Show Answer

Stratosphere


40 In stratosphere the temperature increases form -56o to ___________with height.
(a) 15 {}^o C
(b) 0 {}^o C
(c) -2 {}^o C
(d) -56 {}^o C
Show Answer

-2 {}^o C


41. The increase in temperature of stratosphere is due to _______which absorbs uv-radiation from the sun.
(a) S_8
(b) O_3
(c) NH_4
(d) H_2
Show Answer

O_3


42. Mesosphere starts at the top of the stratosphere and extends from 50km to _______above sea level.
(a) 85 km
(b) 75 km
(c) 65km
(d) 95km
Show Answer

85 km


43. In mesosphere, the temperature decreases from -2 {}^oC to ____________.
(a) -100 {}^oC
(b) 92 {}^oC
(c) 100 {}^oC
(d) None of these
Show Answer

-92 {}^oC


44. Thermosphere is the 4^{th} layer of atmosphere ranges from 85 to ___________above the earth surface.
(a) 300 km
(a) 500 km
(a) 900 km
(a) 1200 km
Show Answer

500 km


45. In thermosphere, the temperature increases from -92 {}^oC to _________________.
(a) 500 {}^o C
(b) 200 {}^o C
(c) 1200 {}^o C
(d) 2000 {}^o C
Show Answer

1200 {}^o C


46. __________is a transitional space between earth’s atmosphere and outer space.
(a) Exosphere
(b) Thermosphere
(c) Mesosphere
(d) Troposphere
Show Answer

Exosphere


47. Atmosphere helps in ___________________.
(a) Maintaining normal temperature
(b) Radio communication
(c) Movement of aircrafts
(d) All of them
Show Answer

All of them


48. The excess discharge of any substance into environment which adversely effects the quality of the environment, cause damage to human, plants and animals is called________________.
(a) Global warming
(b) pollution
(c) Biotic life
(d) None of these
Show Answer

pollution


49. The substance released to air either by human or natural activities, in sufficient amount to cause harmful effects on humans, plants and animals is called___________.
(a) Air pollution
(b) Land pollution
(c) Water pollution
(d) All of these
Show Answer

Air pollution


50. The substances that are responsible for causing air pollution are called______________.
(a) Air pollutants
(b) Water pollutants
(c) Land pollutants
(d) None of these
Show Answer

Air pollutants


51. Pollutants can be in the form of ___________.
(a) Solid particles
(b) Liquid particles
(c) Gases
(d) All of these
Show Answer

All of these


52. There are the ________main types of air pollutants.
(a) 5
(b) 4
(c) 3
(d) 2
Show Answer

2


53. The substances which are released directly into air are called ____________pollutants.
(a) primary
(b) Secondary
(c) Tertiary
(d) None of these
Show Answer

primary


54. Which of them is a primary air pollutant?
(a) SO_x, NO_x
(b) CO_2
(c) VOCs
(d) All of them
Show Answer

All of them


55. Those substances which are not produced directly and formed from the primary pollutants are called _____palutant.
(a) Primary
(b) Secondary
(c) Tertiary
(d) None of these
Show Answer

Secondary


56. Which of the following is a secondary pollutant?
(a) Ozone
(b) SO_2
(c) NO_2
(d) All of these
Show Answer

Ozone


57. Which of the following is a natural source of particulation?
(a) Volcanic eruption
(a) Soil erosion
(a) VOCs
(a) Both a and b
Show Answer

Both a and b


58. Which of the following is anthropogenic source of particulates?
(a) Wood burning
(b) Mining
(c) Mountain blasting
(d) All of them
Show Answer

All of them


59. Chlorofluoro carbons (CFCa) are a group of compounds which contain chlorine, fluorine and _________element.
(a) Nitrogen
(b) Carbon
(c) Helium
(d) Oxygen
Show Answer

Carbon


60 CFCs are used as a propellant in ___________.
(a) Aerosol spray
(b) refrigerators
(c) Air-conditions
(d) All of them
Show Answer

All of them


61 ________in CFCs catalyzes the conversion of ozone to oxygen atom and molecule.
(a) Chlorine
(b) Carbon
(c) Fluorine
(d) Bromine
Show Answer

Chlorine


62. The chlorine atom in CFCs has the ability to destroy a large amount of ______________.
(a) H2SO_4
(b) HNO_3
(c) O_2
(d) H_2CO_3
Show Answer

O_2


63. Carbon monoxide is a ________________gas.
(a) Colorless
(b) Odorless
(c) Poisonous
(d) All of them
Show Answer

All of them


64. Carbon monoxide combines with hemoglobin and reduces the oxygen-carrying capacity of ___________.
(a) Blood
(b) Cells
(c) Gills
(d) Chills
Show Answer

Blood


65. __________damages the contract nervous system causes blurred vision, headache, nausea and a sudden death.
(a) CO_2
(b) NaCl
(c) CO
(d) HCl
Show Answer

CO


66. ________causes respiratory problems, irritation of eyes, nose and throat, pneumonia, damage to leather , iron, steal etc.
(a) SO_2
(b) CO
(c) CO_2
(d) NO
Show Answer

SO_2


67. Polyaromatic compounds (PAC) and polyaromatic hydrocarbons(PAH) are _____compounds which can cause leukemia and other diseases.
(a) Conductor
(b) carcinogenic
(c) Acidic
(d) Bad conductor
Show Answer

carcinogenic


68. The rain having pH less than 5.6 is called__________.
(a) Acid rain
(b) Neutral rain
(c) Basic rain
(d) None of these
Show Answer

Acid rain


69. Acid rain destroys vegetation and cause damage to ____________.
(a) Human skin
(b) Hair
(c) Monuments
(d) All of these
Show Answer

All of these


70. The process of enrichment of water by salts that causes changes in ecosystem is called _________.
(a) Eutrophication
(b) Acid rain
(c) Ozone depletion
(d) None of these
Show Answer

Eutrophication


71. Pollutants decrease the concentration of ozone below its normal level in stratosphere coursing —-
(a) Global warming
(b) Ozone depletion
(c) Acid rain
(d) None of these
Show Answer

Ozone depletion


72. Normal rain water is slightly acidic with a pH range of —–
(a) 5.6-6
(b) 3.9-5.6
(c) 6-7.4
(d) None of these
Show Answer

5.6-6


73. The most acidic rain having least pH value of—-has been reported until now.
(a) 3.1
(b) 2.1
(c) 4.1
(d) 1.1
Show Answer

2.1


74. Acid rain is one of the adverse effects of ——
(a) Air pollution
(b) Land pollution
(c) Water pollution
(d) non
Show Answer

Air pollution


75. Acid is the result of—–in the atmosphere.
(a) CO_2
(b) SO_2
(c) NO_2
(d) All of them
Show Answer

All of them


76. Acid rain generally leads to ——
(a) Weathering of building
(b) Corrosion of metals
(c) Peeling of paints
(d) All of them
Show Answer

All of them


77. At pH ——most fish eggs cannot hatch .
(a) 5
(b) 7
(c) 9
(d) 12
Show Answer

5


78. At pH less than 5 ,some adult fish may —–.
(a) Migrate
(b) Hibernate
(c) Die
(d) non
Show Answer

Die


79. Who can tolerate the condition of around pH-4 ?
(a) Fish
(b) Frog
(c) snake
(d) non
Show Answer

Frog


80. At ——–attitude , acidic fog and cloud decrease the nutrients from trees and plants.
(a) high
(b) Intermediate
(c) lower
(d) non
Show Answer

high


81. The —-is soluble in water and washed away with rainwater .
(a) CaCO_3
(b) CaSO_4
(c) H_2CO_3
(d) H_2SO_4
Show Answer

CaSO_4


82. The acidic particle corrode ——and cause paint and stone to deteriorate more quickly .
(a) Alkali metals
(b) Non metal
(c) All metal
(d) non
Show Answer

All metal


83. Ozone is an —–from of oxygen consisting of three chemically bonded oxygen atoms.
(a) Allotropic
(b) Crystalline
(c) amorphous
(d) non
Show Answer

Allotropic


84. The ozone name was given by the scientist—-in 1840.
(a) Emiliano
(b) schonbein
(c) Christopher
(d) non
Show Answer

schonbein


85. Ozone is derived from a —–word ‘’ozoaterr’’ wich mean smell.
(a) Greek
(b) Latin
(c) Persian
(d) non
Show Answer

Greek


86. The ozone layer is present in——
(a) troposphere
(b) stratosphere
(c) mesosphere
(d) None of these
Show Answer

stratosphere


87. The molecular formula of ozone is —–
(a) O_3
(b) O_2
(c) O
(d) None of these
Show Answer

O_3


88. Ozone is present in the lower part of stratosphere also called as —–.
(a) Ionosphere
(b) Exosphere
(c) Ozonosphere
(d) None of these
Show Answer

Ozonosphere


89. Ozone is a ——-colour gas.
(a) reddish
(b) purple
(c) bluish
(d) None of these
Show Answer

bluish


90. The decrease in the concentration of ozone in stratosphere below its normal level is called —-
(a) Global warming
(b) Ozone depletion
(c) desertification
(d) None of these
Show Answer

Ozone depletion


91. About 80% of ozone depletion occurs due to ——
(a) CfCs
(b) Fossil fuels
(c) Forest fire
(d) None of these
Show Answer

CfCs


92. Ozone layer damages the ——.
(a) Skin cancer
(b) Cause cataract
(c) Aging of skin
(d) All of them
Show Answer

All of them


93. The increase in average temperature of the earth s surface as well as its atmosphere is called —-
(a) Green house effect
(b) Global warming
(c) Ozone depletion
(d) None of these
Show Answer

Global warming


94. CO_2, CH_4 , NO_2 \ and \ O_3 are called ——-gases .
(a) Green house
(b) noble
(c) hydrocarbons
(d) None of these
Show Answer

Green house


95. Without Green house effect temperature on earth would be ——.
(a) 15 {}^o C
(b) -18 {}^o C
(c) 30 {}^o C
(d) -30 {}^o C
Show Answer

-18 {}^o C


96. What is the effect of global warming ?
(a) desertification
(b) Sea level rise
(c) cyclones
(d) All of them
Show Answer

All of them

Chemistry Class 10 MCQs (All Chapters)


Jawad Khan

Jawad Khan

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