MDCAT Chemistry Online Test With Answers

MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 A single chloride free redical can destroy bow many ozene molecules? 100 100000 10000 10
2 The range of UV-B is: 320 to 400 nm 200 to 280 nm 280 to 320 nm 50 to 400 nm
3 Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects: Eyes Ears Stomach Nose
4 The pH range of acid rain is? 7-6.5 6.5-6 6-5.6 Less than 5
5
The pH range of acid rain is?
 7-6.5 6.5-6 6-5.6 Less than 5
6 C6H12O6is molecular formula of: Glucose Dextrose Fructose All of these
7 C6H12O6is molecular formula of: Glucose Dextrose Fructose All of these
8 Polyesters resins have special use in: Clothing Paints Emulsion Floor covering
9 Polymer formed by the combining of three different monomers is called: Homopolymer Copolymer Ter polymer Thermoplastic polymers
10 Two or more similar monomers combine to form: Homopolymer Copolymer Ter polymer Thermoplastic polymer
11 Molar mass of high molecular w.f. polymers ranges from: 1000 to 10000 10000 to 100000 100000 to 1000000 1000 to 1000000
12 The simplest separating unit of a polymer is called: Monomer Dimer Trimer Macromer
13 The simplest separating unit of a polymer is called: Monomer Dimer Trimer Macromer
14 The simplest separating unit of a polymer is called: Monomer Dimer Trimer Macromer
15 Poly hydroxyl compounds of aldehyde and ketones are? Carbohydrates Proteins Fats Lipids
16 Simple sugars are: Monosaccharides Disaccharides Oligo saccharides Trisaccharides
17 Cotton has cellulose in it: 96% 97% 98% 99%
18 Cellulose does: Satisfy human appetite Stimulates intestinal peristalsis Fives fibre and bulk to the food All of these
19 The high molecular weight materials which yield on hydrolysis the amino acids is called: Carbohydrates Lipids Fatty acids Proteins
20 Factors affected denaturation of proteins: Change in temp and pH Strong reducing agent Strong oxidizing agent All of these
21 Major food factors are? Fats and oils Carbohydrates Proteins All of these
22 Which is the drived lipid? Common fats Vitamin-D Common oils Spinolipids
23 Which property is not present in lipids? Liquid Solid and semi solid Soluble in water Form emulsion
24 An oil of fat with no double bond have iodine number: Zero 100% 50% Minimum
25 The steroids of fungi and yeast are called: Vitamin D Vitamin D<sub>2</sub> Ergosterol Cholesterol
26 Which behaves as insulator for animals body? Carbohydrates Proteins Fats Skin
27 Which one of the following statements about Glucose and sucrose is incorrect? Both are soluble in water Both are naturally occurring Both are carbohydrates Both are disaccharides
28 The reaction between fat and NaOH is called? Esterification Hydrogenolysis Fermentation Sponification
29 Which one of the following enzymes brings about the hydrolysis of fats? Urease Maltase Zymase Lypase
30 Which one of the following is water soluble vitamin? Niacin Riboflavin Trypsin Ascorbic acid
31 Which one of following elements is not present in all proteins? Carbon Hydrogen Nitrogen Sulphur
32 Vegetable oils are: Unsaturated fatty acids Glycerides of unsaturated fatty acids Essential oils obtained from plants
33 A polymeric substance that is formed in the liquid state and then hardened to a liquid solid us called as: Fibre Plastic Varnish Polyamide resin
34 The fibre which is made from acrylonitrile as monomer: PVC Rayon fibre Acrylic fibre Polyester fibre
35 Plastics are a pollution problem because many plastics: Are made from petroleum Are very inflammable Burn to produce toxic fumes Decompose to produce toxic products
36 Which of these polymers is a synthetic polymer? Animal fat Starch Cellulose Polyester
37 Which of these polymers is and addition polymer? Nylon-6, 6 Polystyrene Terylene Epoxy resin
38 In which of these processes are small organic molecules made into macro-molecules? The cracking of petroleum fractions The fractional distillation of crude oil The polymerization of ethane The hydrolysis of proteins
39 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
40 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
41 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
42 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
43 Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil diffusion convection electrophoresis chromatography
44 Soil remediation means to make it suitable for cultivation of crops to make it acidic to make it alkeline to add manure into it
45 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
46 Ecology is a science of environment and deals specially with stratosphere biosphere lithosphere hydrosphere
47 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 non reactive chemically
48 To purify water which has mud dissolved in it, a substance which coagulates the suspended particles is used.
The coagulant may be
 Ag<sup>+</sup> Cu<sup>2+</sup> Al<sup>3+</sup> Si<sup>4+</sup>
49 Water which his considered to be safe for human consumption is known as distilled water contaminated water potable water rain water
50 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution live stock waste agricultural pesticides oil beaks and spills all of the above
51 Which is not the condition for the formation of smog there must be sufficient NO gas there must be sunlight to help photo chemical reactions to take place air must be blowing swifty there must be SO<sub>2</sub>in the air
52 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water SO<sub>2</sub> NO<sub>2</sub> CO a and b only
53 The pH of the rain water in areas where acid rain is the cause of pollution may be 6.5 5.6 4.5 2.2
54 NO and NO2gases in atmosphere are represented by NO NO<sub>4</sub> NO<sub>x</sub> N<sub>x</sub>O<sub>y</sub>
55 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as environment hydrosphere pollutant biosphere
56 The largest item which is recycled is newspaper plastic aluminium oil
57 In water the most important oxidizing agent is dissolved molecular oxygen which ranges form 2 - 4 ppm 4 - 6 ppm 2 - 5 ppm 4 - 8 ppm
58 The toxic organic compounds and heavy metals and metalloids results in contamination of surface water ground water both surface and ground water neither surface nor ground waters
59 Polycyclic aromatic hydrocarbons are taught to be Disinfectant Carcinogenic Helpful Reactive
60 Which of the following human activities are contaminating surface and ground waters? pesticides septic ranks petroleum and natural gas production all of these
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