MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test With Answers

image
image
image

MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

Sr. # Questions Answers Choice
1 The normal amount of overhead ozone is 350 DU 450 DU 400 DU 300 DU
2 The yellow color present in the photo chemical smog is due to presence of the Carbon dioxide Nitrogen dioxide Chlorine All
3 How much quantity of total water is available as fresh water 3% 1% 10% 21%
4 How much quantity of water is in the domestic use 0.08% 16% 24% 90%
5 The ozone depletion in the stratophere is mainly due to the reaction of ozone with Freons CFCs Both A and B None
6 The suspended particles in the raw water can be removed by the Coagulation Aeration Hydration Dehydration
7 The smog having high contents of SO2is Neutral smog Reducing smog Oxidizing smog Artificial smog
8 Ozone is usually produced in the South polar region North pole region Tropical region Thermosphere zone
9 The water is considered to be polluted when the concentration of oxygen in it is 6 - 9ppm 6 ppm 8 ppm Less than 4pm
10 Which of the following factors is not used to determine the quality of water COD BOD DO Available chlorine
11 The temperature of in the incineration of industrial and hazardous waste process has range 900 - 1000°C 250 - 500°C 950 - 1300°C 500 - 900°C
12 A single chloride free radical can destroy the ozone molecules 100 100000 10000 10
13 The pH range of the acid rain is 7 - 6.5 6.5 - 6 6 - 5.6 Less than 5
14 COD of water can be measured by Cr<sub>2</sub>O<sub>3</sub> Cr<sub>2</sub>O<sub>4</sub><sup>-2</sup>ions Cr<sub>2</sub>O<sub>7</sub><sup>-2</sup>ions None of these
15 BOD means Boron oxygen deuterium Biochemical oxygen demand Biochemical oxygen dissolved Biochemical oxygen death
16 Lead pollution is mainly due to Metallic pollution Space pollution Acid rain Cd pollution
17 Detergent greatly effects the Aquatic life Modern life Terrestrial life Plants life
18 Ozone is effectively removed by TNT CFCs PVC CNG
19 Ozone layer is 25 - 28 km high 26 - 29 km high 24 - 27 km high 20 - 28 km high
20 Sea gets polluted bu accidental oil spills and Atmospheric pressure Nitrogen gas Cargo oil tankers Aero plane
Download This Set
×