ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as Environment Hydrosphere Pollutant Biosphere
2 The largest item which is recycled is Newspaper Plastic Aluminium Oil
3 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from 2 - 4 ppm 4 - 6 ppm 2 - 5 ppm 4 - 8 ppm
4 The toxic organic compounds and heavy metals and metalloids results in contamination of Surface water Ground water Both surface and ground water Neither surface nor ground waters
5 Polycyolic aromatic hydrocarbons are taught to be Disinfectant Carcinogenic Helpful Reactive
6 Which of the following human activities are contaminating surface and ground waters Pesticides Septic tanks Petroleum and natural gas production All of these
7 When chlorofluoro carbon are subjected to U.V. they form Cations Anions Free radicals None of these
8 Ozone in most of the tropical regions acts as a pollutant and causes Damages to eyes Aggravates asthma Chest discomfort All of these
9 The normal amount of overhead ozone is about 250 Du 300 DU 350 DU 400 DU
10 The amount of Si in the lithosphere is about 27.72% 30.35% 35.30% 40.21%
11 The amount of oxygen in the lithosphere is about 35.50% 40.60% 56.60% 50.50%
12 In the atmosphere, CO2is about 0.01% 0.03% 0.05% 0.09%
13 In the atmosphere, O2is about 10% 15% 21% 25%
14 The film forming components of paints are Resins Thinners Pigments Driers
15 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called Primary pollutant Secondary pollutant Tertiary pollutant None of these
16 Chromium (VI) is highly toxic and can cause Blindness Cancer Liver problems Blood problems
17 Which gasses are produced from landfills NH<sub>3</sub> H<sub>2</sub>S N<sub>2</sub> All of these
18 In purification of potable water the coagulant used is Nickle sulpahte Copper sulpahte Barium sulpahte Alum
19 Which is not a method for solid waste management Landfill Incinerating Recycling None of these
20 Ecosystem is a smaller unit of Hydrosphere Lithosphere Biosphere Atmosphere
21 Fungicides are the pesticides which Control the growth of fungus Kill insects Kill plants Kill herbs
22 A single chlorine free radical can destroy how many ozone molecules 100 100000 10000 10
23 Which heavy metals do not have any safe limits As Hg Cr All of these
24 SO2Makes ______ acid rains Carbonic acid Sulfuric Nitric acid All of these
25 The pH range of the acid rain is 8 - 7 7 - 6.5 6.5 - 6 Less than 5
26 Which of the following waste material is not recycled for use again Paper Plastic Hides of animals Glass
27 In incinerating the waste is burnt at 1000°C 100°C 2000°C 1500°C
28 Chromium (VI) is highly toxic and can cause Blindness Cancer Liver problems Blood problems
29 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like Pb Cr Hg All of these
30 Which step is unnecessary for purification of water for drinking purposes Aeration Coagulation Treatment with chlorine Treatment with iodine
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