MDCAT Chemistry Online Test With Answers

MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 The destructive distillation of coal gives three products. which of following is not the product of destructive distillation of coal? Coal tar CO<sub>2</sub> Coal gas Coke
2 As the number of carbon atoms increase the number of isomers also increase. The six carbon compound hexane has as many as: 10 isomers 3 isomers 5 isomers 6 isomers
3 Which of the following are characteristics of oxidizing smog? It is yellow brownish grey haze It has unpleasant odour Its main reactant are nitric oxide &amp; unburnt hydrocarbon All of the above
4 Primary pollutant is that: Waste product of an industry Which causes cancer Whose concentration cannot be controlled Which corrode the metal only
5 The substance which adversely affects the human health is: Ecosystem Ecosphere Atmosphere Pollutant
6 The thickness of ozone layer is: 25----50 km 3km only 25---28 km 1 km only
7 The main pollutant of leather tanneries in the waste water is due to: Lead Copper Chromium (VI) Chromium (III)
8 Which of the following is used as coagulant for purification potable water? Copper sulphate Barium sulphate Alum Nickel sulphate
9 Photochemical smog contains----as main reactants Nitrous oxide &amp; unburnt hydrocarbons NO &amp; brunt hydrocarbons Nitric oxide &amp; unburnt hydrocarbons N2O &amp; burnt hydrocarbons
10 The conc.of dissolved molecular oxygen in water which act as the most important oxidizing agent ranges from: 2ppm- 6ppm 4ppm--8ppm 2ppm--- 4ppm 2ppm --3ppm
11 Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that cause contamination of fresh water? Rain Oil leaks-&amp; spills Livestock waste Disposal of industrial effluents
12 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy? 50000 20000 100000 10000
13 Why is CO called as pollutant? reason is: It combines with oxygen It inactivates glycoblysis It combines with hemoglobin Inactivates nerves
14 Which is unnecessary for purification of water for drinking purpose? Coagulation Treatment with iodine Aeration Chlorination
15 Newspaper can be recycled again and again by how many times 5 4 2 3
16 Fungicides are the pesticides which: Kill plants Kill insects Kill herbs Control the growth of fungus
17 What is effect of polluted air on enviroment: Ozone Global warming Acid rain Smog
18 The pH range of acid rain is: 6.5 -6 8-7.5 Less than 5 7- 6.5
19 The temperature in the incineration of industrial and hazardous waste process has a range of: 950-1300C 250-500C 500-900C 900-1000C
20 Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of: 2 days 5 days 6 days 7 days
21 Potassium fertilizers are especially useful for: Tobacco Potato Coffee All of these
22 The composition mixture of clay and lime stone in a raw material is: 75% limestone &amp; 25% clay 15% limestone &amp; 55% clay 25 limestone &amp; 75% clay 55% limestone &amp; 15% clay
23 Which of the following is woody raw material used for making pulp and paper: Eucalyptus Bagasse Wheat straw Cotton linter
24 Usually the % of moisture in paper is: 1---3% 6---8% 4---6% 5%
25 Calendar stock is process in paper making in which Moisture is removed Pulp is spreaded over fabric or screen Paper thickness is removed Paper is wounded in the form of reel
26 Which of the following substance is used as filler or additive in paper making: Glucose Starch Fructose Cellulose
27 Which process of pulp making is mostly used in Pakistan? Kraft process Sulphite process Neutral sulphite semi chemical process (NSSC) All of these
28 Setting process of cement is based on: Hydrolysis Dehydration Hydration Oxidation
29 Cement is mixture of so many compounds roasted in rotary kiln.Which substance has greater percentage: Lime Alumina Silica Magnesia
30 Which sequence of step is correct for the manufacture of cement: Crushing, mixing, heating, grinding Crushing, heating, mixing, grinding Crushing, grinding, mixing, heating Mixing, heating, grinding, crushing
31 What is clinker? Roasted calcareous material Roasted calcareous &amp; argelarious material Roasted argillaceous material Roasted gypsum
32 Which is not a calcareous material: Lime Marble Clay Marine shel
33 Micronutrients are required in quantity ranging from: 4----40g 6------200kg 6-----200g 4-------40kg
34 Fine powder gypsum is mixed with clinker up to: 4% 6% 5% 7%
35 Select the name of reedy plant from which word paper is derived: Sunflower Water hyacinth Papyrus Rose
36 How many zones through which charge passes in a rotary kiln. 3 4 5 6
37 The elements like N,P,K added into the large amount in soil are called: Basic elements Additives Macronutrients Micronutrients
38 Phosphorous is very useful in growth of: Leave Root Stem Seed
39 Which fiber contains 85% acrylonitrile by weight: Acrylic fiber Azlon fiber Saran fiber Rayon fiber
40 Lecithin is an example of: A simple lipid Phospholipids Waxes Proteins
41 The destruction of the biological nature and activity of proteins by heat or chemical agent is called: Dehydration Oxidation Denaturation Polymerization
42 Which of the following is an example of aldohexose? Ribose Sucrose Fructose Glucose
43 Methyl mercaptan, CH3SH, is one of the substances responsible for bad breath and is often used to impart a smell to natural gas in a pipeline.
What will be formed  when CH3SH is burned in an excess of air?
CO&nbsp;&nbsp;&nbsp;&nbsp; CO<sub>2</sub>&nbsp;&nbsp;&nbsp;&nbsp; H<sub>2</sub>S<br> CO&nbsp;&nbsp;&nbsp; H<sub>2</sub>O&nbsp;&nbsp;&nbsp;&nbsp; SO<sub>3</sub><br> CO<sub>2</sub>&nbsp;&nbsp;&nbsp; H<sub>2</sub>O&nbsp;&nbsp;&nbsp; SO<sub>2</sub><br> CO<sub>2</sub>&nbsp;&nbsp;&nbsp;&nbsp; H<sub>2</sub>O&nbsp;&nbsp;&nbsp;&nbsp; SO<sub>3</sub><br>
44 When gaseous chemicals are transported y road or by rail they are classified as follows:
              flammable       non-flammable        poisonous
which gas is poisonous:
 butane <br> non-flammable <br> hydrogen <br> sulphur dioxide <br>
45 Which oxide when mixed with water, will produce the most acidic solution?
CO CO<sub>2</sub> SiO<sub>2</sub> P<sub>2</sub>O<sub>5</sub>
46 Each of the following compounds is effective as a refrigerant.
The release of which one of these cause the greatest depletion of the ozone layer?
 CC<sub>2</sub>/F<sub>2</sub> CH<sub>3</sub>OCH<sub>3</sub> CH<sub>3</sub>CHF<sub>2</sub> CH<sub>3</sub>CH<sub>2</sub>CH<sub>3</sub>
47 In many countries plastic waste is collected separetaly and sorted.Some of this is incinerated to provide heat for power stations.
Why is pvc polyvinylchloride,removed from any waste that is to be incinerated?
 It can be melted down and re-used <br> its combustion products are harmful <br> it destroys the ozone layer<br> it does not burn easily<br>
48 Dichlorodifluoromethane, CC/2F2 has been used in aeroso propellants and as a refrigerant.
Which statement helps to explain why dichlorodifluromethane is chemically inert ?
 The carbon-fluorine bond energy is large <br> The carbon-fluorine bond has a law polarity <br> Fluorine is highly electronegative<br> Fluorine compound are non-flammable <br>
49 Which one of the following is used as coagulant for purification potable water:
 copper sulphate <br> alum <br> barium <br> nicket sulphate <br>
50 Choose a point which is not included in the components of environment:
 stratosphere <br> hydrosphere <br> lithosphere <br> biosphere <br>
51 Lithosphere has amount of silicon:
 35.30% 27.72% 40.01% 21.13%
52 Photo chemical smog contains _________ as main reactants:
 nitrons oxide and unburnt hydrocarbons <br> niliric oxide and unburnt hydrocarbons <br> NO and burnt hydrocarbons <br> N<sub>2</sub>O and burnt hydrocarbons <br>
53 The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges form:
 2ppm - 6ppm<br> 2ppm - 4ppm<br> 4ppm - 8ppm<br> 2ppm - 3ppm<br>
54 The cause of minamate disease is the pollution of:
 arsenic (As) into atmosphere <br> industrial waste having Hg <br> organic waste in drinking H<sub>2</sub>O<br> oil spills in H<sub>2</sub>O<br>
55 Oceans, rivers, streams, lakes, polar ice caps, glaciers and group water reservoirs are included in:
 atmosphere <br> lithosphere <br> hydrosphere <br> biosphere <br>
56 Surface and ground water sources are contaminate by various human activity. which of the following is not a human activity that causes contamination in fresh water?
 rain <br> live stock waste <br> oil leaks and&nbsp; spills <br> disposal of industrial effluents <br>
57 CFCs destroy ozone layer, How many ozone molecule a chlorine free radical can destroy:
 50,000 100,00 20,000 10,000
58 Which of the following wast material is not recycled for use again?
 glasses <br> paper <br> plastic toys <br> hides of animals <br>
59 Choose the chief air pollutant among the following which depletes ozone layer:
 carbon monoxide <br> carbon dioxide <br> chloroflurocarbons and nitrogen oxides <br> sulphur dioxide <br>
60 SO2 and NO2 cause pollution due to increase in:
 buffer action <br> basicity <br> acidity <br> neutrality <br>
Download This Set

Is this page helpful?