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CHAPTER 14
ENVIRONMENTAL CHEMISTRY-I THE ATMOSPHERE
Encircle the most appropriate answer among the following options
1 Percentage of Nitrogen in the composition of 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
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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:
(a)-12.
(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
(d)11km
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
(b)ozone
(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%
(d)32%
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