MDCAT Chemistry Chapter 22 Online Test With Answers

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MDCAT Chemistry Chapter 22 Online Test

Sr. # Questions Answers Choice
1 Photo chemical smog contains ______ as main reactants Nitrons oxide and unburnt hydrocarbons Nilric oxide and unburnt hydrocarbons No and burnt hydrocarbons N<sub>2</sub>O and burnt hydrocarbons
2 The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from 2 ppm - 6 ppm 2 ppm - 4 ppm 4 ppm - 8 ppm 2 ppm - 3 ppm
3 The cause of minamata disease is the pollution of Arsenic (As) into atomosphere Industrial waste having Hg Organic waste in drinking H<sub>2</sub>O Oil spills in H<sub>2</sub>O
4 Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in Atmosphere Lithosphere Hydrosphere Biosphere
5 Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that causes contamination in fresh water Rain Live stock waste Oil leaks and spills Disposal of industrial effluents
6 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destory 50,000 10,000 20,000 None of these
7 Which of the following waste material is not recycled for use again Glasses Paper Plastic toys Hides of animals
8 Choose the chief air pollutant among the following which depletes ozone layer Carbon monoxide Carbon dioxide Chloroflurocarbons and nitrogen oxides Sulphur dioxide
9 SO2and NO2cause pollution due to increase in Buffer action Basicity Acidity Neutrality
10 Why is carbon monoxide called as pollutant? The reason is that It combines with oxygen It combines with haemoglobin It inactivates glycolysis It inactivates nerves
11 Which is unnecessary for purification of water for drinking purposes Coagulation Aeration Treatment with Iodine Treatment with chlorine
12 Which one of the following is not a component of environment Biosphere Stratosphere Hydrosphere Lithosphere
13 Which factor is helping to reduce the environmental pollution Urbanization Industrialization Increase of plantation Rapid growth of population
14 A single chlorine free radical can destory how many ozone molecules 10 100 1000 10000
15 Newspapers can be recycled again and again by how many times 5 2 4 3
16 Fungicides are the pesticides which Kill plants Kill herbs Kill insects Control the growth of fungus
17 What is the effect of polluted air on environment Ozone Acid rain Global warming Smog
18 The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required To help plant to under go photosynthesis To destroy nitrogen oxide from the atmosphere To help to clean the atmosphere To help in fixing of bacteria
19 In big/metropolitan cities, atmosphere is mostly polluted due to Radioactive fall out Household waste Pesticide residue Automobile exhausts
20 The reason of acid rains is Release of CO in excess by in complete combustion Excess release of NO<sub>2</sub>and SO<sub>2</sub>from buring of fossil fules Formation of excess CO<sub>2</sub>due to combustion and respiration Formation of NH<sub>3</sub>in excess from industry and coal gas
21 Cyclone collector is used to reduce Noise pollution Air pollution Water pollution Radioactive pollution
22 The pH range of the acid rain is 6.5 - 6 Less than 5 8 - 7.5 7 - 6.5
23 Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect Nose Stomach Eyes Ears
24 Ecosystem is a smaller unity of Nydosphere Biosphere Lithosphere Attmosphere
25 The temperature in the incineration of industrial and hazardons waster process had a range 950 to 1300°C 500 to 900°C 250 to 500°C 900 to 1000°C
26 Choose the correct statements SO<sub>2</sub>affects the nucleus SO<sub>2</sub>affects plasmodesmata SO<sub>2</sub>affects cell wall SO<sub>2</sub>affects all membrane systems
27 Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases NO<sub>2</sub> SO<sub>2</sub> Hg Pb
28 Which one of the following does not act as pollutant Carbon monoxide Sulphur dioxide Hydrocarbons Carbon dioxide
29 Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of 2 day 6 day 5 day 7 day
30 The main pollution of leather tanneries in the waste is due to the salt of Chromium Copper Chromium Lead
31 Potable water is considered to be Safe for human consumption The ground water The surface water Now safe for human consumption
32
Major cause of SO2 on global scale is
 <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Volcanoes</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Electric sparks</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Combustion</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">All</span>
33 Residence time of methane in the atmosphere is <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">3 - 7 days</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">2 -3 days</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">3 - 7 years</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">2 - 3 years</span>
34
Which of the following is not a secondary pollutant
 <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Ozone</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Carbonic acid</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Sulphuric acid</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Carbon dioxide</span>
35
Three elements needed for the healthy growth of plants are
 <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">N P K</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">N K C</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">N S P</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">N Ca P</span>
36 Requirement of macronutrient per acre of the land is <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">5 to 200 kg</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">20-200 kg</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">200-400 kg</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">30-400 kg</span>
37 Which of the following is a macronutrient? <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Boron</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Iron</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Copper</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Carbon</span>
38
Which of the following is not a heavy industry?
 <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Iron</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Fertilize</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">Paper</span> <span style="color: rgb(0, 0, 0); font-family: Verdana, Tahoma; font-size: 12px;">None</span>
39 Water exist in only <span style="font-size: 0.95em;">One state</span> <span style="font-size: 0.95em;">Two state</span> Three states <span style="font-size: 0.95em;">4 states</span>
40 Hard water can block radiators due to formation of <span style="font-size: 0.95em;">Insoluble calcium and magnesium salts</span> <span style="font-size: 0.95em;">Insoluble sodium salts</span> <span style="font-size: 0.95em;">In soluble phosphate salts</span> <span style="font-size: 0.95em;">Insoluble potassium salts</span>
41 Addition of washing soda removes <span style="font-size: 0.95em;">Softness of water</span> <span style="color: rgb(0, 0, 0); font-size: 0.95em;">Temporary hardness of water</span><br> <span style="font-size: 0.95em;">Permanent hardness of water</span> <span style="font-size: 0.95em;">Hydrogen from water</span>
42 Temporary hardness can be removed by adding <span style="font-size: 0.95em;">Lime</span> <span style="font-size: 0.95em;">Carbon</span> <span style="font-size: 0.95em;">Oxygen</span> <span style="font-size: 0.95em;">Slaked lime</span>
43 Hardness which can be removed by boiling is called <span style="font-size: 0.95em;">Permanent hardness</span> <span style="font-size: 0.95em;">Temporary hardness</span> <span style="font-size: 0.95em;">Stiffness</span> <span style="font-size: 0.95em;">Toughness</span>
44

Natural water is

 <span style="font-size: 0.95em;">Pure</span> <span style="font-size: 0.95em;">Impure</span> <span style="font-size: 0.95em;">Acts as solute</span> Distilled
45 Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is <span style="font-size: 0.95em;">2: 1</span> <span style="font-size: 0.95em;">1: 2</span> <span style="font-size: 0.95em;">3: 1</span> <span style="font-size: 0.95em;">4: 1</span>
46 Property due to which water acts as a universal solvent is <span style="font-size: 0.95em;">Polarity</span> <span style="font-size: 0.95em;">It's ability to make hydrogen bond</span> <span style="font-size: 0.95em;">Both A and B</span> <span style="font-size: 0.95em;">Strong dipole dipole interaction</span>
47 Density of water becomes maximum at <span style="font-size: 0.95em;">10°C</span> <span style="font-size: 0.95em;">4°C</span> <span style="font-size: 0.95em;">5°C</span> <span style="font-size: 0.95em;">12°C</span>
48 Out of total amount of water available for human use is <span style="font-size: 0.95em;">0.30%</span> <span style="font-size: 0.95em;">0.2%</span> <span style="font-size: 0.95em;">40%</span> <span style="font-size: 0.95em;">50%</span>
49 Water in swimming pools is purified by adding <span style="font-size: 0.95em;">Sodium</span> <span style="font-size: 0.95em;">Chlorine</span> <span style="font-size: 0.95em;">Phosphorus</span> <span style="font-size: 0.95em;">Potassium</span>
50 Water which forms scum with soap is called <span style="font-size: 0.95em;">Hard water</span> <span style="font-size: 0.95em;">Soft water</span> <span style="font-size: 0.95em;">Distilled water</span> <span style="font-size: 0.95em;">Un distilled water</span>
51 During thunderstorms, water dissolves <span style="font-size: 0.95em;">Dust particles</span> HCl <span style="font-size: 0.95em;">Nitric acid</span> <span style="font-size: 0.95em;">Clouds</span>
52 Chlorofluorocarbon, CF2Cl2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
53 Increased awareness of environmental issues has led chemists 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
54 Why a C - Cl 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
55 CFC's are known to cause depletion of ozone layer therefore their use has been banned in refrigerators and air conditioners. Which alternate compound may be suitable to replace CFC CCl<sub>4</sub> CHCl<sub>3</sub> CH<sub>3 </sub>- CH<sub>2</sub>- CH<sub>2</sub>- CH<sub>3</sub> CHCl<sub>2</sub>- CHF<sub>2</sub>
56 One of the environmental problem is the formation of oil slicks when oil is spilled form 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
57 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic It attaches to sulphur of the disulphide link Hg is a heavy metal Hg is liquid at room temperature Hg is reactive chemically
58 What is the cause of water pollution Chemical and bacterial constants in live stock The spilled oil in rivers and ponds Wide spreads used of pesticides All of these
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