ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Potable water is considered to be Safe for human consumption Not safe for human consumption The surface water The ground water
2 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water Low value Higher value Both values None of these
3 Exposure to CO results in Headache Fatigue Unconsciousness All of these
4 Which gas is not a constituent of atmosphere Xe O<sub>3</sub> H<sub>2</sub> F<sub>2</sub>
5 Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water Live stock waste Oil leaks and spills Disposal of industrial effluents Rain
6 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy 10,000 20,000 100,000 50,000
7 Which is not the affect of polluted air on environment Acid rain Smog Ozone Global warming
8 Which one of the following is not air pollutant gas CO CO<sub>2</sub> NO SO<sub>2</sub>
9 Which factor is helping to reduce the environmental pollution Rapid growth of population Urbanization Industrialization Increase of plantation
10 A pollutant affects Human health Quality of life Functioning of ecosystem All of these
11 The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount Iodine Bromine Lead Carbon
12 The region of earth capable of supporting life is Hydrosphere Lithosphere Biosphere Atmosphere
13 Oceans cove ______ percent of the surface of the earth 60 70 80 97
14 The % of CO2is the atmosphere is 3.0% 0.03% 0.3% 0.5%
15 Which is not a component of environment Biosphere Lithospahre Hydrosphere None of these
16 What is the most common catalyst used in hydrogenation of oils Cobalt Nickel Tungsten Copper
17 β-D-glucose is a monomer for Strach Cellulose Glycogen Protein
18 Monosaccharides belong to the group Lipids Fats Proteins Carbohydrates
19 Which one of the following is a water soluble vitamin D K A Ascorbic acid (Vic C)
20 Vegetable oils are Unsaturated fatty acids Glycerides of unsaturated fatty acids Glyccerides of saturated fatty acids Essential oils obtained from plants
21 The fibre which is made form acrylonitrile as monomer PVC Rayon fibre Acrylic fibre Polyester fibre
22 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
23 Purines include Adenine Guanine Both a and b None
24 Which of these polymers is an addition polymer Nylon 6,6 Polystyrene Terylene Epoxy resin
25 Enzymes are chemically Carbohydrates Proteins Fatty acids Phospholipids
26 Which is not an enzyme Transverses Lipase Lyase None of these
27 (CH2O)nis general formula for Monosaccharides Oiligosaccharides Polysaccharides None of these
28 Which of the following is the repeating monomeric unit in cellulose Sucrose Maltose Cellobiose Glucose
29 Monosaccharides are Aldoses Ketoses Either a and b None of these
30 Substances that render enzymes catalytically inactive are called Conenzymes Substrates Inhibitors Apoezymes
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