10th Class Chemistry Chapter 14 MCQs with Answers

The following are 10th Class Chemistry Chapter 14 MCQs. We have collected these MCQs for online Test Preparation and academic as well as Competitive Exams all board exams in Pakistan, and CSS, PMS, college, and University Entrance tests, MDCAT tests, NTS tests, GAT, GRE, Entry Tests, etc. You can easily prepare yourself for any Test. These chemistry MCQs are also important for Teaching Jobs like SST, Subject Specialist, Lecturer, or Teaching Assistant. We have organized the 10th class chemistry chapter wise so you can find all the MCQs by clicking on the link of each chapter. 

10th Class Chemistry Chapter 14 MCQs with Answers

10th Class chemistry  MCQS Available Here. On these pages, you can get 10th Class chemistry MCQs with Answers.
You can read and practice, 10th Class Chemistry MCQs on Different topics, We make an Online question bank with the help of experienced teachers and subject specialists.

10th Class students of all educational boards can prepare for their exams online here on our site and by attempting these online MCQs they can make sure their preparation level for their annual exams is perfect. 10th Class Chemistry Chapters include Chapter 9 – Chemical Equilibrium, Chapter 10 – Acid, Base, and Salts, Chapter 11 – Organic Chemistry, Chapter 12 – Hydrocarbons, Chapter 13 – Biochemistry, Chapter 14 – The Atmosphere, Chapter 15 – Environmental Chemistry and Chapter 16 – Chemical Industries


The atmospheric chemistry studies the chemical composition of the natural atmosphere, the way gases, liquids, and solids in the atmosphere interact with each other and with the earth’s surface and associated biota, and how human activities may be changing the chemical and physical characteristics of the atmosphere


1 Percentage of Nitrogen in the composition of the atmosphere by volume is :

(a) 78.09%.

(b) 20.94%

(c) 0.03%

(d) 0.93%

2 % of sunlight is absorb by atmospheric gases:

(a) 18

(b) 19

(C) 20

(d) 30


3 Atmosphere consists of_..spheres:

(a) four

(b) five

(c) six

(d) seven

4 Temperature decreases from 17°C to -58°C regularly in the lowest layer extending upto kilometers:


(b) 13

(c) 14

(d) 15

5 This layer extend upto 50 km:

(a) Stratosphere

(b) Mesosphere

(c) Troposphere

(d) Thermosphere

6 Height above the earth surface of troposphere is :

(a) 0-12km

(b) 12-50km

(c) 50-85km

(d) 85-120km

7 Height above the earth surface of stratosphere is:

(a) 12-50km

(b) 50-85km

(c) 85-120km

(d) 120-130km

8 Height above the earth surface of mesosphere is:

(a) 50-85km

(b) 85-120km

(c) 120-130km

(d) 130-180km

9 Height above the earth surface of thermosphere is:

(a) 85-120km

(b) 120-130km

(c) 130-180km

(d) 180-190km

10 About 99% atmosphere mass lies within:

(a) 30km

(b) 35km

(c) 15km


11 Depending upon temperature variation, atmosphere is divided into regions:

(a) 1

(b) 2

(c) 3

(d) 4

12 Just above the earth surface is:

(a) Mesosphere

(b) Stratosphere

(c) Thermosphere

(d) Troposphere

13 A group of gasses that maintain the temperature of atmosphere is:

(a) carbon dioxide and water vapours.

(b) nitrogen and carbon dioxide

(c) oxygen and water vapours

(d) nitrogen and oxygen

14 The earths atmosphere is getting hotter because of increasing concentration of:

(a) CO

(b) CO2

(c) O2

(d) SO2

15 Which one of the followings is not a green house effect:

(a) Increasing atmosphere temperature

(b) Increasing food chains

(c) Increasing flood risks

(d) Increasing sea level

16 Normally rain water weakly acidic because of dissolved:

(a) SO2 gas

(b) CO2 gas

(c) SO3 gas

(d) NO2 gas

17 Buildings are being damaged by acid rain because it attacks:

(a) calcium sulphate

(b) calcium nitrate

(c) calcium carbonate

(d) calcium oxalate

18 Ozone is beneficial for us as it absorbs:

(a) infra radiations

(b) ultra violet radiations

(c) chlorofluorocarbons

(d) air pollutants

19 Which one of the following is not a air pollutant:

(a) Nitrogen dioxide

(b) Nitrogen

(c) Ozone

(d) carbon dioxide

20 Iron and steel structures are damaged by:

(a) carbon dioxide

(b) carbon monoxide

(c) methane

(d) sulphate

21 Infrared radiations emitted by the earth are absorbed by:

(a) CO2 and H2O

(b) N2 and O2

(c) CO2 and N2

(d) O2 and CO2

22 Cause of global warming is:

(a) CO2

(b) SO2

(c) NO2

(d) SO3

23 Which gas protects the surface of earth from ultra violet radiations:

(a) CO2

(b) CO

(c) N2

(d) O3

24 Percentage of Argon in atmosphere by volume is

(a) 0.93

(b) 0.03

(c) 0.04

(d) 78.09

25 Percentage of carbon dioxide in atmosphere by volume is

(a) 0.03

(b) 0.21

(c) 0.93

(d) 78.09

26 The temperature of stratosphere at lower layer is

(a) 58°C

(b) 49°C

(c) 60°C

(d) 72°C

27 The harmful substances present in air are called

(a) air pollutants


(c) carbon dioxide

(d) water

28 These pollutants are the wasted or exhaust products driven out because of combustion of fossil fuels and organic matter

(a) primary

(b) secondary

(c) tertiary

(d) none

29 These pollutants are produced by various reaction of primary pollutants

(a) secondary

(b) primary

(c) tertiary

(d) none

30 How many natural systems of Earth is divided?

(a) 4

(b) 3

(c) 2

(d) 1

31 Wavelength of Sunlight radiation is:

(a) long

(b) small

(c) both a and b

(d) none

32 Solar energy absorbed by Earth is converted into:

(a) heat energy

(b) light energy

(c) both a and b

(d) none

33 How much energy is absorbed by atmospheric gases?

(a) 6%

(b) 23%

(c) 18%


34 How much energy is absorbed by Earth?

(a) 6%

(b) 23%

(c) 50%

(d) 32%

35 Lower layer of atmosphere is extended upto:

(a) 12 km

(b) 50 km

(c) 85 km

(d) 110km

36 Stratosphere extends upto:

(a) 12 km

(b) 50 km

(c) 85 km

(d) 110 km

37 The major constituents of troposphere are:

(a) O2 & N2

(b) CO2 & CO

(c) SO2 & SO3

(d) NOX

38 In which region of atmosphere weathers occur?

(a) Thermosphere

(b) Mesosphere

(c) Stratosphere.

(d) Troposphere

39 Which is responsible for rise in temperature in stratosphere?

(a) O3

(b) CO2

(c) CO

(d) O2

40. Which region is next to troposphere?

(a) Thermosphere

(b) Mesosphere

(c) Stratosphere

(d) Atmosphere

41 Mid of stratosphere is composed of:

(a) O3

(b) CO2

(c) CO

(d) H2SO4

42 Which is not a primary pollutant?

(a) SO3

(b) CO2

(C) CH4

(d) O3

43 Which is not a secondary pollutant?

(a) H2SO4

(b) HNO3

(c) PAN

(d) NH3

44 When wood burns in limited supply of oxygen which gas is produced:

(a) CO2

(b) CO

(c) SO2

(d) SO3

45 pH of normal rain water is:

(a) 6

(b) 7

(c) 8

(d) 9

46 pH of acid rain is:

(a) 4

(b) 5

(c) 6

(d) 7

47 Acid rain attacks on:

(a) CaCO3

(b) K2CO3

(c) Na2CO3

(d) HNO3

48 Decreased ozone layer will increase infectious disease like:

(a) fever

(b) cholera

(c) malaria

(d) headache

49 Thermosphere lies beyond:

(a) troposphere.

(b) mesosphere .

(c) stratosphere

(d) none

50 PAN is the abbreviation of

(a) Perhydroxy acetyl nitrate

(b) Polyhydroxy acetyl nitrite

(c) Poly Alkyl nitrate

(d) Perhydroxyl acetyl nitrite

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