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 In the atosphere, CO2is about 0.01% 0.03% 0.05% 0.09%
2 In the atmosphere, O2is about 10% 15% 21% 25%
3 The film forming components of paints are resins thinners pigments driers
4 Hydrocarbons, SO2, CO, NH3nitrogen oxides and compounds of fluorine are called Primary pollutant Secondary pollutant Tertiary pollutant None of these
5 Which gases are produced from landfills? NH<sub>3</sub> H<sub>2</sub>S N<sub>2</sub> All of these
6 In Purification of potable water the coagulant used is nickel sulpahte copper sulpahte barium sulphate alum
7 Which not a method for solid waste management> Landfill Incinerating Recycling None of these
8 Ecosystem is a smaller unit of Hydrosphere Lithosphere Biosphere Atmosphere
9 A single chlorine free radical can destroy how many ozone molecules 100 100000 10000 10
10 Which heavy metals do not have any safe limits As Hg Cr All of these
11 SO2makes ___________ acid rains carbonic acid Sulfuric Nitric acid All of these
12 The pH rain of acid rain is 8 - 7 7 - 6.5 6.5 - 6 less than 5
13 Which of the following waster material is not recycled for use again paper plastic hides of animals glass
14 In incinerating the waste is burnt at 1000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 100<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 2000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 1500<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
15 Chromium (VI) is highly toxic and can cause Blindness Cancer Liver problems Blood problems
16 Industrial effluents have toxic synthetic organic compounds as well as heavy metals like Pb Cr Hg All of these
17 Which step is unnecessary for purification of water for drinking purposes aeration coagulation treatment with chlorine treatment with iodine
18 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water low value higher value both values none of these
19 Exposure to CO results in Headche Fatigue Unconsciousness All of these
20 Which gas is not a constituent of atmosphere? Xe O<sub>3</sub> H<sub>2</sub> F<sub>2</sub>
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