MDCAT Chemistry Online Test With Answers

MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 When chlorofluoro carbon are subjected to U.V they form Cations Aninons Free radicals None of these
2 Ozone in most of the tropical regions acts as a pollutant and cause damages to eyes aggravates asthma chest discomfort all of these
3 The normal amount of overhead ozone is about 250 Du 300 DU 350 DU 400 DU
4 The amount of Si in the lithosphere is about 27.72% 30.35% 35.30% 40.21%<br>
5 The amount of oxygen in the lithosphere is about 35.50% 40.60% 46.60% 50.50%
6 In the atosphere, CO2is about 0.01% 0.03% 0.05% 0.09%
7 In the atmosphere, O2is about 10% 15% 21% 25%
8 The film forming components of paints are resins thinners pigments driers
9 Hydrocarbons, SO2, CO, NH3nitrogen oxides and compounds of fluorine are called Primary pollutant Secondary pollutant Tertiary pollutant None of these
10 Which gases are produced from landfills? NH<sub>3</sub> H<sub>2</sub>S N<sub>2</sub> All of these
11 In Purification of potable water the coagulant used is nickel sulpahte copper sulpahte barium sulphate alum
12 Which not a method for solid waste management> Landfill Incinerating Recycling None of these
13 Ecosystem is a smaller unit of Hydrosphere Lithosphere Biosphere Atmosphere
14 A single chlorine free radical can destroy how many ozone molecules 100 100000 10000 10
15 Which heavy metals do not have any safe limits As Hg Cr All of these
16 SO2makes ___________ acid rains carbonic acid Sulfuric Nitric acid All of these
17 The pH rain of acid rain is 8 - 7 7 - 6.5 6.5 - 6 less than 5
18 Which of the following waster material is not recycled for use again paper plastic hides of animals glass
19 In incinerating the waste is burnt at 1000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 100<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 2000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 1500<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
20 Chromium (VI) is highly toxic and can cause Blindness Cancer Liver problems Blood problems
21 Industrial effluents have toxic synthetic organic compounds as well as heavy metals like Pb Cr Hg All of these
22 Which step is unnecessary for purification of water for drinking purposes aeration coagulation treatment with chlorine treatment with iodine
23 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
24 Exposure to CO results in Headche Fatigue Unconsciousness All of these
25 Which gas is not a constituent of atmosphere? Xe O<sub>3</sub> H<sub>2</sub> F<sub>2</sub>
26 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
27 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy 10,000 20,000 100,000 50,000
28 Which is not the affect of polluted air on environment acid rain smog ozone global warming
29 Which one of the following is not air pollutant gas CO CO<sub>2</sub> NO SO<sub>2</sub>
30 Which factor is helping to reduce the environment pollution rapid growth population urbanization idustrialization increase of plantation
31 A pollutant affects Human affects Quality of life Functioning of ecosystem All of these
32 The 95.5% mass of Lithoshone 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
33 The region of earth capable of supporting life is Hydrosphere Lithosphere Biosphere Atmosphere
34 Oceans cove ____________ percent of the surface of the earth 60 70 80 97
35 The % of CO2in the atmosphere is 3.0% 0.03% 0.3% 0.5%
36 Which is not a component of environment? Biosphere Lithosphere Hydrosphere None of these
37 The trade name of polytereafluoroethylene (PTFE) is Teflon PVC terelene polyester
38 The main source of natural fibre is animal fibres vegetables fibres mineral fibres all of the above
39 The fibre which is made from vinylidine chloride polymer is called rayon fibre azlon fibre acetate fibre all of the above
40 Formation of PVC form vinyl chloride is an example of substitution reaction addition polymerization condensational reaction Aldol condensation
41 Which one of the following substances is a synthetic polyester? cotton nylon rayon terylene
42 The formation of PVC from vinyl chloride is an example of subtsitution reaction addition polymerization condensation polymerization condensation reaction
43 A chemical inert and heat resistant plastic, that is made from tetrafluoroethylene, is called teflon PVC Bakelite polyamide
44 The basic difference between synthetic and natural fertilizer is in their raw material crop application usage shapes
45 Terylen fibre is made by reaction of terephthalic acid with ethylene ethylene glycol glycol terylene
46 Nylon 6 6 is prepared by the reaction of hexamethylene with formic acid acetic acid adipic acid none of these
47 The fibre which is obtained from naturally occuring protein is called saran azlon rayon nylon
48 Which of the following is a thermosetting plastic? PVC polyethylene polystyrene melamines
49 The substances which soften the polymer are called stabilizers plasticizers retarders pigments
50 The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as saran fibre nylon polyester acetate fibre
51 Cotton is an example of animal fibre mineral fibre vegetable fibre synthetic fibre
52 Which of the following are thermoplastic materials? PVC polystyrenes polyethylene all these
53 What is not true about DNA? it preserves genetic information Synthesizes protein it has a linear structure To replicates
54 RNA is a polymer of a nucleotide which consist of three components. Which one is not the component in the nucleotide of an RNA D-Ribose wracil base prosphate group thyamine base
55 DNA is a polynucleic acid. The monomer is known as a nucleotide. What is not the component of the nuleotide Phosphate group Deoxy ribose sugar Uracil base Adenine base
56 Enzymes catalyse all biological reactions occuring in the cell. What is true about an enzyme? Enzyme is a small molecule Enzyme is acidic in nature Enzyme is a protein Enzyme is a lipid
57 There are 20 amino acids found in protein which is not the property of these amino acids They are all alpha-amino acids They are all optically active They have high decomposition point They are water soluble
58 Which functional group is present in glycerol tristearate Carboxylic acid Alcohol Aldehyde Ester
59 A nucleoside may be Ribonucleoside Deoxyribonucleoside Both a and b None
60 The proteins which are derived by conjugated proteins are called as Simple protein Complex protein Derived protein None
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