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 Ozone layer is high: 20-23 km 22-25 km 23-26 km 25-28 km
2 The normal amount of overhead ozone is about in DU: 150 250 350 450
3 Amount of ozone in atmosphere is expressed in units: Kilograms cm molarity DU
4 Ozone gas has boiling point: Low High Medium Highest
5 Photochemical smog consists of higher concentration of: Oxidants Ozone a &amp; b NO<sub>3</sub>
6 The words smog is a combination of smoke and: fog foke fork fizzy
7 The eleventh concentration of metal cause clogs of gills in fish: Al He Pb Ca
8 Acidification of soil can leach metal: Al Hg Pb Ca
9 Phenomenon of acid rains gain importance in: 1930s 1940s 1950s 1960s
10 Augus smith discovered in the mid of seventeenth century: acid Base Acid rain Fertilizer
11 Men residence time of methane in atmosphere in years is: 1-7 2-7 3-7 4-7
12 Oxides of sulphur react in atmosphere by various reactions to form: sulphates sulphites sulphides sulphate aerosols
13 Coal contains percentage of sulphur: 1-9% 5-9% 6-9% 7-9%
14 The percentage of SO2 produced by volcanoes is: 47% 57% 67% 77%
15 Poisoning of CO can be reveresed by giving oxygen at pressure: low least medium High
16 Transportation causes to produce CO2 in atmosphere: 72% 73% 74% 75%
17 Which is property of CO? Soluble in water Insoluble in water No toxic Pole coloured
18 Carbon Monoxide is: colouriess orderless high toxic All of these
19 Primary pollutants are: oxides of sulphur oxides of carbon oxides of nitrogen All of these
20 Which gas produces air pollution? oxides of sulphur oxides of carbon all of these
Download This Set
×