MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test With Answers

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MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

Sr. # Questions Answers Choice
1 The branch of chemistry interlinked with biology, physics, medicines, agriculture, public health and sanitary engineering etc. is: Biochemistry Physical chemistry Pharmaceutical chemistry Environmental chemistry
2 Chemistry related to the study of environment affected by the chemicals and pollutants is called: Biochemistry Physically chemistry Pharmaceutical chemistry Environmental chemistry
3 The rigid rocky part of earth crust called lithosphere extends upto a depth of: 10 km 100 km 1000 km 1500 km
4 Components of environment is (in km) around the earth: 10 km 100 km 1000 km 1500 km
5 The layer of earth around the earth is called: Atmosphere Hydrosphere Lithosphere Biosphere
6 Nitrogen in the atmosphere is: 78% 21% 0.9% 0.03%
7 Reason of pollution are: Population and urbanization Transportation Industrialization All of these
8 Volcanoes produce SO2: 47% 57% 67% 77%
9 Coal contains sulphur in it: 1-3% 1-6% 1-9% 1-12%
10 Main cause of reducing map is: Combustion of coal NO and NO<sub>2</sub> Un-burnt hydrocarbons All of these
11 Unit of ozone is? Debye Dobson Esu Coulumb
12 Depletion of ozone is more during the month: Jan-March April-Jun July-Aug Sept-Nov
13 A single free chlorine redical can destroy ozone molecules upto: 100000 100 1000 10000
14 How much pesticides have been synthesized at present? Four thousand Six thousand Eight thousand Ten thousand
15 Forms of waste products: Heat Smoke Solid All of these
16 Contamination of water of tanning industries is due to: Cr(III) Cr(VI) Mn(III) Mn(VII)
17 Factors affecting quality of water: D.O BOD COD a,b,c
18 BOD is the oxygen demand with in day(s): Four Two Three Five
19 BOD is the oxygen demand with in day(s): Four Two Three Five
20 Water is purified by the process: Aeration Coagulation Chlorination All of these
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