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 Which one is more toxic? Fe C Hg Ag
2 Chemicals used to kill fungi are: Herbicides Insecticides Pesticides fungicides
3 Chemicals used to kill herbs are: Herbicides Insecticides Pesticides Fungicides
4 Chemicals used to kill pests are: Herbicides Insecticides Pesticides fungicides
5 Chemicals used to kill insects are: Herbicides Insecticides Pesticides Fungicides
6 The most important pesticides are: Herbicides Insecticides Fungicides All
7 Synthetic organic pesticides formulated nowadays are more then: One thousand Ten thousand Two thousands Twenty thousand
8 Many petroleum products are: coloured colourless testy poisoinous
9 Petroleum or crude oil is a complex mixture of compounds mainly: benzene minerals hydrocarbons phenols
10 Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water: Live stock wastes Oil spilage detergents pesticides
11 A single chloride free radical of CFCs can destroy upto ozone molecules: 10 100 1000 100000
12 Chlorofluorocarbons and aerosols are inert in sphere: troposphere stratosphere lithosphere hydrosphere
13 Troposphere extends upto km: 0-15 km 10-15 km 15-40 km 15-40 km
14 Ozone in stratosphere extends upto km: 0-15 km 10-15 km 15-40 km 15-25 km
15 Term ozone hole is used for depletion of ozone during months of: Jan-Feb March - Sep Sep- Nov Dec-Feb
16 By the mid of 1980s depletion of total overhead ozone in antarctic region is 20% 30% 40% 50%
17 Ozone acts as: Pollutant saver oxidatant All of these
18 Ozone is produced in regions: tropical Polor antaric equator
19 A large hole in the ozone layer over antarctica region was discovered in: 1960s 1970s 1980s 1990s
20 Ozone is present in layer around earth: atmosphere tropospher stratosphere thermosphere
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