MDCAT Chemistry Online Test With Answers

MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 In macromolecules DP stands for Dissociation parameter Dissociation polymer Degree of polymerization None of these
2 A polymer may be Linear Branched Cross linked All of these
3 Macromolecules or polymers are large molecules built up from small molecules called monomers. This hypothesis put forward by schrodixger standinger Lewsi newton
4 Hydrolysis of protein by 6M HCl gives peptides and then alpha-amino acids. How many alpha-amino acids molecules are obtained on the hydrolysis of a tetrapeptide 2 3 4 5
5 The amino group in 19 alpha-amino acids is primary; only one alpha-amino acid has secondary amino group which one is that Alanine Glutamic acid Glycine Proline
6 Which of the following alpha-Amino acids has basic R-group Proline Glutamic acid Histidine Valine
7 Which is not an essential amino acid Leucine Methionine Histidine Lysine
8 Essential alpha-amino acids are those which are necessary in the diet.
Which one is an essential alpha-amino acids
 Alanine Aspartic acid Glycine Tryptophan
9 Amino acids are bifunctional organic compounds what are the two function groups Carboxylic acid and alcohol Acohol and aldehyde Carboxylic acids and ketone Amino group and carboxylic acid
10 Detergents are synthetic products natural products both a and b none of the above
11 Surfactants are organic compounds; used in detergents which reduce the viscosity of water surface tension of water boiling point of water wetting ability of water
12 The chemical reactivity of glass is reduced by the use of fluxes formers stabilizers none of the above
13 Macro-nutrients are required in quantities ranging from 5 kg - 200 kg 2 kg - 100 kg 1 kg - 50 kg 10 kg - 100 kg
14 Which woody raw material is used for the manufacture of paper pulp? cotton bagasse poplar rice staw
15 The development of industries was a direct result of which major factor population living standards depletion of resources all of these
16 Silk is an example of animal fiber vegetable fibre mineral fibre none of these
17 Substances that tend to decrease the activity of enzymes are called coenzyme activators inhibitors apoenzyme
18 How many zones through which the charge passes in a rotary kiln? 4 3 2 5
19 Which is not a calcareous material? lime clay marble marine shell
20 The word paper is derived from the name of which reedy plant rose sun flower papyrus water hyacinth
21 During the manufacturing process of cement the temperature of the decomposition zone goes up to 600<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 800<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 1000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 1200<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
22 Which woody raw material is used of the manufacture of paper pulp? cotton bagasse poplar rice straw
23 The number of paper industries in Pakistan are 30 25 35 20
24 At present the number of cement factories is Pakistan are 20 22 25 30
25 Which one of the following is used as coagulant for purification potable water Copper sulphate Alum Barium sulphate Nickel sulphate
26 Chose a point which is not included in the components of environment Stratosphere Hydrosphere Lithosphere Biosphere
27 Lithosphere has amount of silicon 35.30% 27.72% 40.01% 21.13%
28 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
29 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
30 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
31 Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in Atmosphere Lithosphere Hydrosphere Biosphere
32 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
33 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destory 50,000 10,000 20,000 None of these
34 Which of the following waste material is not recycled for use again Glasses Paper Plastic toys Hides of animals
35 Choose the chief air pollutant among the following which depletes ozone layer Carbon monoxide Carbon dioxide Chloroflurocarbons and nitrogen oxides Sulphur dioxide
36 SO2and NO2cause pollution due to increase in Buffer action Basicity Acidity Neutrality
37 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
38 Which is unnecessary for purification of water for drinking purposes Coagulation Aeration Treatment with Iodine Treatment with chlorine
39 Which one of the following is not a component of environment Biosphere Stratosphere Hydrosphere Lithosphere
40 Which factor is helping to reduce the environmental pollution Urbanization Industrialization Increase of plantation Rapid growth of population
41 A single chlorine free radical can destory how many ozone molecules 10 100 1000 10000
42 Newspapers can be recycled again and again by how many times 5 2 4 3
43 Fungicides are the pesticides which Kill plants Kill herbs Kill insects Control the growth of fungus
44 What is the effect of polluted air on environment Ozone Acid rain Global warming Smog
45 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
46 In big/metropolitan cities, atmosphere is mostly polluted due to Radioactive fall out Household waste Pesticide residue Automobile exhausts
47 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
48 Cyclone collector is used to reduce Noise pollution Air pollution Water pollution Radioactive pollution
49 The pH range of the acid rain is 6.5 - 6 Less than 5 8 - 7.5 7 - 6.5
50 Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect Nose Stomach Eyes Ears
51 Ecosystem is a smaller unity of Nydosphere Biosphere Lithosphere Attmosphere
52 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
53 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
54 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
55 Which one of the following does not act as pollutant Carbon monoxide Sulphur dioxide Hydrocarbons Carbon dioxide
56 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
57 The main pollution of leather tanneries in the waste is due to the salt of Chromium Copper Chromium Lead
58 Potable water is considered to be Safe for human consumption The ground water The surface water Now safe for human consumption
59 Steroids belong to the family of Protein Enzyme Lipids Carbohydrates
60 In the body, carbohydrates are broken down into Glucose Fatty acids Amino acids Nucleic acid
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