MDCAT Chemistry Online Test With Answers

MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Which is the correct electronic configuration of chromium. 1s<sup>2</sup>,2s<sup>2</sup>,3s<sup>2</sup>,2p<sup>6</sup>,3p<sup>6</sup>,4s<sup>2</sup>,3d<sup>6</sup> 1s<sup>2</sup>,2s<sup>2</sup>,2p<sup>6</sup>,3s<sup>6</sup>,3p<sup>6</sup>,3d<sup>6</sup> 1s<sup>2</sup>,2s<sup>2</sup>,3s<sup>2</sup>,2p<sup>6</sup>,3p<sup>6</sup>,4s<sup>2</sup>,3d<sup>4</sup> 1s<sup>2</sup>,2s<sup>2</sup>,2p<sup>6</sup>,3s<sup>2</sup>,3p<sup>6</sup>,4s<sup>2</sup>,3d<sup>5</sup>
2 Down the group acid base behavior of metallic oxides of group 2 elements changes to . More basic No change Less basic More acidic
3 Which one the following is the structure of Teflon? (-CH2-CH2-)n (-CF2-CH2-)n (-CF2-CF2-)n (-CF2-CCl2-)n
4 The catalyst used for the manufacture of H2SO4 by contact process is with bromine? SO3 Pt/pd V2O5 Fe2O3
5 The dilute solution of ___________ is called vinegar. Formic acid Acetic acid Oxalic acid Benzoic acid
6 In period 1 and period 3 maximum melting point shown by elements. Nitrogen and phosphorous Carbon and silicon Lithium and sodium Neon and argan
7 Gas is enclosed in a container of 20 cm3 with the moving piston. According to kinetic theory of gases, what will be the effect on freely moving molecules of the gas if temperature is increased from 20 oC in 100 oC? Volume will be increased Decrease rate of a reaction Decrease yield of a reaction Increase yield of product
8 According to Lowry-bronsted acid and bass concept, H2O is A salt An acid A base An amphoteric species
9 The potential difference of an electrochemical cell is measured by Calorimeter Voltmeter Galvanometer Ammeter
10
The standard electrode potential of hydrogen is arbitrarily taken at 298 K is		 1.00 volt 0.00 volt 10.0 volt 0.10 volt
11 Which one of the following enthalpy change ins always exothermic? Enthalpy of atomization Enthalpy of combustion Enthalpy of solution Enthalpy of formation
12 Relation of water with quick lime result in the rise in the temperature of the system using the concept of energy change, indicate the nature of the reaction? Endothermic reaction Third order reaction Exothermic reaction Non spontaneous reaction
13 The shape of [Co(NH3)6]3+ complex is. Linear Octahedral T<br>Tetrahedral Square planer
14 Electron affinity of the atom is the energy released when electron is removed from gaseous atom Covalent bond of molecule is broken Electron is added to gaseous atom Covalent bond is formed between the atom
15 Which of the following molecule has largest number of shared pair of electrons? CO<sub>2</sub> N<sub>2</sub> NH<sub>3</sub> C<sub>2</sub>H<sub>4</sub>
16 Which option shows all the molecule with bond angle 109.5o. CH<sub>4,</sub>CCl<sub>4</sub>,NH<sub>3</sub> CH<sub>4</sub>,NH<sub>4</sub> PH<sub>3</sub> SiCl<sub>4</sub> H<sub>2</sub>O BeCl<sub>2</sub> SiCl<sub>4</sub> Nh<sub>4</sub>CH<sub>4</sub>
17 Liquid in the container have temperature 70 C. What will be the temperature in Kelvin Scale? 203 K 350 K 343 K 300 K
18 While finding the relative atomic mass, which of the following standard is used to compare the atomic mass of chlorine . Carbon-12 Neon -20 Carbon -13 Nucleon number
19 3.0 mole of calcium will contained________ g of calcium. 100 gm 105 gm 80 gm 120 gm
20 Percentage of nitrogen by volume in air is 20% 78% 98% 50%
21 The incineration may reduce volume of wastes upto: 1/4th 1/2nd 2/3rd 3/4th
22 For incineration temperature range is (in oC) 700-800 800-900 900-1000 1000-1100
23 Leachate contains: fatty acids Bacteria Heavy metals All of these
24 Site of land for landfill is selected based upon. topography location of ground water table All of these
25 The semi solid wastes in landfills is called: Landfill effluents Leachate Incineration
26 a hole used to dump the municipal wastes is called: landfill effluents leachate inclneration
27 Water cover earth surface more than: 50% 60% 70% 80%
28 HOCl is a compound: Polor inorganic organic Ionic covalant
29 Coagulation removes suspended particles in ran water: 60% 70% 80% 90%
30 Insoluble ferric oxide is produced in the pH range: 1 to 8 6 to 9 3 to 13 8 to 13
31 Commonly used coagulants are ions of: Ferrous Al Cr Ferric
32 alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium. sulphates oxides hydroxides chlorides
33 Pathogens in raw water are killed in step: aeration coagulation chlorination treatment
34 Water is made disinfectant during purification of water to the step: aeration coagulation chlorination treatment
35 Chemical like Al2(SO4) or alum are used in purification of water druing step: aeration coagulation chlorination treatment
36 Materials suspended in water or present as colloidal form in raw water are removed by: aeration coagulation chlorination treatment
37 Suspended matter is settled in purification of water by: aeration coagulation chlorination treatment
38 Water is purified by: Filtration aeration coagualation All of these
39 Leather tanneries use big auantities of: Cr Vi salts Cr III salts Mn-salts Pb-salts
40 Which is the most toxic among the given? heavy metals non-metals Metals Metalloids
41 Which one is more toxic? Fe C Hg Ag
42 Chemicals used to kill fungi are: Herbicides Insecticides Pesticides fungicides
43 Chemicals used to kill herbs are: Herbicides Insecticides Pesticides Fungicides
44 Chemicals used to kill pests are: Herbicides Insecticides Pesticides fungicides
45 Chemicals used to kill insects are: Herbicides Insecticides Pesticides Fungicides
46 The most important pesticides are: Herbicides Insecticides Fungicides All
47 Synthetic organic pesticides formulated nowadays are more then: One thousand Ten thousand Two thousands Twenty thousand
48 Many petroleum products are: coloured colourless testy poisoinous
49 Petroleum or crude oil is a complex mixture of compounds mainly: benzene minerals hydrocarbons phenols
50 Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water: Live stock wastes Oil spilage detergents pesticides
51 A single chloride free radical of CFCs can destroy upto ozone molecules: 10 100 1000 100000
52 Chlorofluorocarbons and aerosols are inert in sphere: troposphere stratosphere lithosphere hydrosphere
53 Troposphere extends upto km: 0-15 km 10-15 km 15-40 km 15-40 km
54 Ozone in stratosphere extends upto km: 0-15 km 10-15 km 15-40 km 15-25 km
55 Term ozone hole is used for depletion of ozone during months of: Jan-Feb March - Sep Sep- Nov Dec-Feb
56 By the mid of 1980s depletion of total overhead ozone in antarctic region is 20% 30% 40% 50%
57 Ozone acts as: Pollutant saver oxidatant All of these
58 Ozone is produced in regions: tropical Polor antaric equator
59 A large hole in the ozone layer over antarctica region was discovered in: 1960s 1970s 1980s 1990s
60 Ozone is present in layer around earth: atmosphere tropospher stratosphere thermosphere
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