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 is used as a coagulant: Ferric salts Potash alum a and b both Chlorine
2 Chloroform is carcinogenic: Heart Lungs Liver Kidney
3 Newspaper can be recycled again and again by how many times? 2 3 4 5
4 The temperature in the incineration process has a range: 900 to 1000<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°C</span> 650 to 1100<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°C</span> 950 to 1300<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°C</span> 500 to 900<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°C</span>
5 In purification of potable water the coagulant used is: Nickel sulphate Copper sulphate Barium sulphate Aluminium sulphate
6 The main pollutant of leather in the waste water is due to the salt of: Lead Chromium (VI) Copper Chromium (III)
7 DDT is a: Fungicide Insecticide Herbicide All
8 Fungicides are the pesticides which: Control the growth of fungus Kills insects Kills plants Kill herb
9 A single chloride free redical can destroy bow many ozene molecules? 100 100000 10000 10
10 The range of UV-B is: 320 to 400 nm 200 to 280 nm 280 to 320 nm 50 to 400 nm
11 Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects: Eyes Ears Stomach Nose
12 The pH range of acid rain is? 7-6.5 6.5-6 6-5.6 Less than 5
13
The pH range of acid rain is?
 7-6.5 6.5-6 6-5.6 Less than 5
14 Increased awareness of environment issues has led chemist to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn, which one is not the guiding principle avoid waste production use no solvent use a catalyst devise a multistep procedure for synthesis of new compounds
15 Why a C- C bond breaks by uv light Cl is most electronegative Cl is volatile C - Cl bond energy is smaller than that of C - H bond energy uv light provides energy which is sufficient to break C - Cl bond and not C - H bond
16 In addition to many pollutants present in ground water, a successful study was conducted to remove a highly Toxic chemical.What chemical is this Cobalt Nickel Arsenic Sulphur
17 How can heavy metal contamination like the presence of Hg or Pb may be removed from the soil by using water spray by blowing air by treating with EDTA and then flushing the heavy metal complex out of the soil by adding CaO
18 Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil diffusion convection electrophoresis chromatography
19 Soil remediation means to make it suitable for cultivation of crops to make it acidic to make it alkeline to add manure into it
20 One of the environment problem is the formation of oil slicks when oil is spilled from tankers in sea water.
Which treatment is suitable to remove oil slicks
 blow air add Na<sub>2</sub>CO<sub>3</sub> use a specially made sorbent having fluorine trapped in it Use a sorbent having Al<sub>2</sub>O<sub>3</sub>trapped in it
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