MDCAT Chemistry Chapter 22 Online Test With Answers

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MDCAT Chemistry Chapter 22 Online Test

Sr. # Questions Answers Choice
1 Ph of unpolluted rain water is 07 Less than 6 5.6 Less than 5
2 SO2 produced by volcanoes is about 75% 67% 69%<br> 70%
3 Heat balance of earth is maintained by Atmosphere Hydrosphere Lithosphere Stratosphere
4 Half of the mass of atmosphere is concentrated above earth at the hieght of 40 Km 25-28 Km 5-6 Km 100 Km
5 Pan is an irritant to human beings and it affects Eyes Nose Hair Skin
6 Coagulation in the purification of water is carried out by Alum NiSO<sub>4</sub> BaSO<sub>4</sub> CuSO<sub>4</sub>
7 How many times a newspaper can be recycled 02 05 08 10
8 Air pollution causes Acid rain O<sub>3</sub>&nbsp;depletion Green House Effect All
9 Dissolved impurities of potable water can be separated by the process of reduction Aeration Electrolysis Co-angulation
10 White marble buildings are effected by? O<sub>2</sub> SO<sub>2</sub> CI<sub>2</sub> CFC<sub>s</sub>
11 During incineration temperature range of non-rotating chamber is 900-1000C° 650-1100C° 950-1300C° 700-900C°
12 Transformation is a cyclic process in which used plactic is Remelted and styrene is added Converted into low quality substance Converted back into original components None of these
13 Water is considered pollutant when value of Do is 6 PPM 8 PPM 03 PPM 10 PPM
14 The process of coagulation can remove suspended solids in raw water about 50% 60% Less than 40% More than 80%
15 Elevated concentration of ______________ is harmful for fish as it clog the gills causing suffocation AI Hg As Cr(vi)
16 CFCs are mainly used in industries due to Low cost Gaseous nature High reactivity Un stability
17 99.5% mass of lithosphere is made of 03 elements 8 elements 11 elements 15 elements
18 What change in plants indicates toxic effect of SO2 Weathering of leaves Darkening of leaves Falling of leaves Bleaching of leaves
19 An excellent source of energy without causing pollution is Fossil fuel Sun Petroleum Nuclear reactor
20 Hydrosphere includes Seas and rivers Ocean &amp; polar ice caps Ground water All of above
21 Which is not considered as pollutant O<sub>3</sub> CO<sub>2</sub> NO<sub>2</sub> SO<sub>2</sub>
22 Most harmful of biosphere is Deforestation Nuclear fail out Salinity Water logging
23 Exhaust fumes of cars contain which poisonous gas CH<sub>4</sub> C<sub>2</sub>H<sub>6</sub> CO All of these
24 Chlorination of water is effective for Killing pathogens Removing dust Removing hardness Increasing oxygen content
25 It is a biodegradable pollutant Salts of HG DDt Aluminum foil Domestic fuel
26 Biological oxygen demand (BOD) is associated with Organic matter Micro organisms Both a and b None
27 Detergents are surfactants and they reduce the B.P. of water Surface tension of water Wetting ability of water None of these
28 Which of following is primary pollutants N<sub>2</sub>O PAN H<sub>2</sub>SO<sub>4</sub> None of these
29 Which is not an air pollutant N<sub>2</sub> CO NO N<sub>2</sub>O
30 Polar ice caps can melt due to Acid rain Green House Effect Smog Chlorofluorocarbons
31 Ozone layer is present in Troposphere Stratosphere Mesosphere Ionosphere
32 Test of incomplete combustion of petrol in the presence of CO<sub>2</sub> SO<sub>2</sub> NO<sub>2</sub> Co
33 Organic pollutants in water are measured by DO COD Water logging PH
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