MDCAT Chemistry Chapter 22 Online Test With Answers

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MDCAT Chemistry Chapter 22 Online Test

Sr. # Questions Answers Choice
1 Primary pollutants are: oxides of sulphur oxides of carbon oxides of nitrogen All of these
2 Which gas produces air pollution? oxides of sulphur oxides of carbon all of these
3 Smaller unit of biosphere is: specie ecosystem plankton troposphere
4 Elements in lithosphere exist generally as: metals non-metals metalloids minerals
5 Eleven elements made part of earth mass: 97.5% 98.5% 99.5% 100%
6 Lithosphere extends upto kilometer of earth crust in depth: 10 km 100 km 1000 km 10000 km
7 Part of fresh water consumed in domestic purpose: 1% 2% 69% 8%
8 Part of fresh water consumed in industry is: 1% 2% 69% 23%
9 Agriculture consumes part of fresh water: 1% 2% 69% 23%
10 Fresh water of total earth water is: 1% 2% 3% 4%
11 Polar ice caps and glaciers consists total earth water: 1% 2% 3% 4%
12 Ocean contains part earth's water: 95% 96% 97% 98%
13 Hydrosphere covers the surface of erath: 70.8% 71.8% 72.8% 73.8%
14 Heat balance of earth is maintained by sphere: Hydrosphere atmosphers lithosphere biosphere
15 Nitrogen percentage in atmosphere is: 76% 77% 78% 79%
16 Atmosphere consists of gasses: N<sub>2</sub> O<sub>2</sub> Ar All
17 Region of earth capable of supporting life is called: Atmosphere Hydrosphere Lithosphere All of these
18 Rigid rocky crust earth upto a depth of 100 km is called: Atmosphere Hydrosphere Lithosphere All of these
19 Water bodies are included in: Atmosphere Hydrosphere Lithosphere All of these
20 The layer of gases around the earth are called? Atmosphere Hydrosphere Lithosphere All of these
21 What is component of environment? Atmosphere Hydrosphere Lithosphere All of these
22 The scope of environmental chemistry is to study: Source of chemicals Transportation of chemicals Transportation of toxic chemical All of these
23 The branch of chemistry interlinked with biology, physics, medicines, agriculture, public health and sanitary engineering etc. is: Biochemistry Physical chemistry Pharmaceutical chemistry Environmental chemistry
24 Chemistry related to the study of environment affected by the chemicals and pollutants is called: Biochemistry Physically chemistry Pharmaceutical chemistry Environmental chemistry
25 The rigid rocky part of earth crust called lithosphere extends upto a depth of: 10 km 100 km 1000 km 1500 km
26 Components of environment is (in km) around the earth: 10 km 100 km 1000 km 1500 km
27 The layer of earth around the earth is called: Atmosphere Hydrosphere Lithosphere Biosphere
28 Nitrogen in the atmosphere is: 78% 21% 0.9% 0.03%
29 Reason of pollution are: Population and urbanization Transportation Industrialization All of these
30 Volcanoes produce SO2: 47% 57% 67% 77%
31 Coal contains sulphur in it: 1-3% 1-6% 1-9% 1-12%
32 Main cause of reducing map is: Combustion of coal NO and NO<sub>2</sub> Un-burnt hydrocarbons All of these
33 Unit of ozone is? Debye Dobson Esu Coulumb
34 Depletion of ozone is more during the month: Jan-March April-Jun July-Aug Sept-Nov
35 A single free chlorine redical can destroy ozone molecules upto: 100000 100 1000 10000
36 How much pesticides have been synthesized at present? Four thousand Six thousand Eight thousand Ten thousand
37 Forms of waste products: Heat Smoke Solid All of these
38 Contamination of water of tanning industries is due to: Cr(III) Cr(VI) Mn(III) Mn(VII)
39 Factors affecting quality of water: D.O BOD COD a,b,c
40 BOD is the oxygen demand with in day(s): Four Two Three Five
41 BOD is the oxygen demand with in day(s): Four Two Three Five
42 Water is purified by the process: Aeration Coagulation Chlorination All of these
43 Which is used as a coagulant: Ferric salts Potash alum a and b both Chlorine
44 Chloroform is carcinogenic: Heart Lungs Liver Kidney
45 Newspaper can be recycled again and again by how many times? 2 3 4 5
46 The temperature in the incineration process has a range: 900 to 1000<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°C</span> 650 to 1100<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°C</span> 950 to 1300<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°C</span> 500 to 900<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°C</span>
47 In purification of potable water the coagulant used is: Nickel sulphate Copper sulphate Barium sulphate Aluminium sulphate
48 The main pollutant of leather in the waste water is due to the salt of: Lead Chromium (VI) Copper Chromium (III)
49 DDT is a: Fungicide Insecticide Herbicide All
50 Fungicides are the pesticides which: Control the growth of fungus Kills insects Kills plants Kill herb
51 A single chloride free redical can destroy bow many ozene molecules? 100 100000 10000 10
52 The range of UV-B is: 320 to 400 nm 200 to 280 nm 280 to 320 nm 50 to 400 nm
53 Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects: Eyes Ears Stomach Nose
54 The pH range of acid rain is? 7-6.5 6.5-6 6-5.6 Less than 5
55
The pH range of acid rain is?
 7-6.5 6.5-6 6-5.6 Less than 5
56 Increased awareness of environment issues has led chemist to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn, which one is not the guiding principle avoid waste production use no solvent use a catalyst devise a multistep procedure for synthesis of new compounds
57 Why a C- C bond breaks by uv light Cl is most electronegative Cl is volatile C - Cl bond energy is smaller than that of C - H bond energy uv light provides energy which is sufficient to break C - Cl bond and not C - H bond
58 In addition to many pollutants present in ground water, a successful study was conducted to remove a highly Toxic chemical.What chemical is this Cobalt Nickel Arsenic Sulphur
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