MDCAT Chemistry Online Test With Answers

MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1

Natural water is

 <span style="font-size: 0.95em;">Pure</span> <span style="font-size: 0.95em;">Impure</span> <span style="font-size: 0.95em;">Acts as solute</span> Distilled
2 Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is <span style="font-size: 0.95em;">2: 1</span> <span style="font-size: 0.95em;">1: 2</span> <span style="font-size: 0.95em;">3: 1</span> <span style="font-size: 0.95em;">4: 1</span>
3 Property due to which water acts as a universal solvent is <span style="font-size: 0.95em;">Polarity</span> <span style="font-size: 0.95em;">It's ability to make hydrogen bond</span> <span style="font-size: 0.95em;">Both A and B</span> <span style="font-size: 0.95em;">Strong dipole dipole interaction</span>
4 Density of water becomes maximum at <span style="font-size: 0.95em;">10°C</span> <span style="font-size: 0.95em;">4°C</span> <span style="font-size: 0.95em;">5°C</span> <span style="font-size: 0.95em;">12°C</span>
5 Out of total amount of water available for human use is <span style="font-size: 0.95em;">0.30%</span> <span style="font-size: 0.95em;">0.2%</span> <span style="font-size: 0.95em;">40%</span> <span style="font-size: 0.95em;">50%</span>
6 Water in swimming pools is purified by adding <span style="font-size: 0.95em;">Sodium</span> <span style="font-size: 0.95em;">Chlorine</span> <span style="font-size: 0.95em;">Phosphorus</span> <span style="font-size: 0.95em;">Potassium</span>
7 Water which forms scum with soap is called <span style="font-size: 0.95em;">Hard water</span> <span style="font-size: 0.95em;">Soft water</span> <span style="font-size: 0.95em;">Distilled water</span> <span style="font-size: 0.95em;">Un distilled water</span>
8 During thunderstorms, water dissolves <span style="font-size: 0.95em;">Dust particles</span> HCl <span style="font-size: 0.95em;">Nitric acid</span> <span style="font-size: 0.95em;">Clouds</span>
9 Chlorofluorocarbon, CF2Cl2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
10 Increased awareness of environmental issues has led chemists 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
11 Why a C - Cl 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
12 CFC's are known to cause depletion of ozone layer therefore their use has been banned in refrigerators and air conditioners. Which alternate compound may be suitable to replace CFC CCl<sub>4</sub> CHCl<sub>3</sub> CH<sub>3 </sub>- CH<sub>2</sub>- CH<sub>2</sub>- CH<sub>3</sub> CHCl<sub>2</sub>- CHF<sub>2</sub>
13 One of the environmental problem is the formation of oil slicks when oil is spilled form 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
14 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 reactive chemically
15 What is the cause of water pollution Chemical and bacterial constants in live stock The spilled oil in rivers and ponds Wide spreads used of pesticides All of these
16 Ozone is most of the tropical regions acts as a pollutant and causes Damages to eyes Aggravates asthma Chest discomfort All of these
17 Incineration is a process in which solid waste is burned at high temperature ranging from 500 to 600°C 900 to 1000°C 1000 to 1100°C 600 to 700°C
18 Solid waster of the city is disposed off by dumping in a landfill. Which of the following gas is produced in the landfill Oxygen Chlorine Hydrogen sulphide Hydrogen chloride gas
19 The disposal of domestic refuse, commercial and industrial solid wastes are studied under the title Solid waste management Waste management Solid management Semisolid management
20 Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen 2 days 5 days 6 days 7 days
21 Surface and ground water sources are contaminated by various human activities. Which of the following is not human activity that causes contamination in fresh water Live stock waste Oil leaks and spills Desposal of industrial effluents Rain
22 Which of the following is not the required condition for the formation of smog Sufficient NO Sunlight Less movement of air Winds
23 The normal amount of overhead ozone is 350 DU 450 DU 400 DU 300 DU
24 The normal amount of overhead ozone is 350 DU 450 DU 400 DU 300 DU
25 The yellow color present in the photo chemical smog is due to presence of the Carbon dioxide Nitrogen dioxide Chlorine All
26 How much quantity of total water is available as fresh water 3% 1% 10% 21%
27 How much quantity of water is in the domestic use 0.08% 16% 24% 90%
28 The ozone depletion in the stratophere is mainly due to the reaction of ozone with Freons CFCs Both A and B None
29 The suspended particles in the raw water can be removed by the Coagulation Aeration Hydration Dehydration
30 The smog having high contents of SO2is Neutral smog Reducing smog Oxidizing smog Artificial smog
31 Ozone is usually produced in the South polar region North pole region Tropical region Thermosphere zone
32 The water is considered to be polluted when the concentration of oxygen in it is 6 - 9ppm 6 ppm 8 ppm Less than 4pm
33 Which of the following factors is not used to determine the quality of water COD BOD DO Available chlorine
34 The temperature of in the incineration of industrial and hazardous waste process has range 900 - 1000°C 250 - 500°C 950 - 1300°C 500 - 900°C
35 A single chloride free radical can destroy the ozone molecules 100 100000 10000 10
36 The pH range of the acid rain is 7 - 6.5 6.5 - 6 6 - 5.6 Less than 5
37 COD of water can be measured by Cr<sub>2</sub>O<sub>3</sub> Cr<sub>2</sub>O<sub>4</sub><sup>-2</sup>ions Cr<sub>2</sub>O<sub>7</sub><sup>-2</sup>ions None of these
38 BOD means Boron oxygen deuterium Biochemical oxygen demand Biochemical oxygen dissolved Biochemical oxygen death
39 Lead pollution is mainly due to Metallic pollution Space pollution Acid rain Cd pollution
40 Detergent greatly effects the Aquatic life Modern life Terrestrial life Plants life
41 Ozone is effectively removed by TNT CFCs PVC CNG
42 Ozone layer is 25 - 28 km high 26 - 29 km high 24 - 27 km high 20 - 28 km high
43 Sea gets polluted bu accidental oil spills and Atmospheric pressure Nitrogen gas Cargo oil tankers Aero plane
44 Water is essential for life on Moon Space Earth Sun
45 Ozone is a gas having boiling point Unstable High Low Moderate
46 Leaching of nutrients is due to Drying of soil Combustion of soil Acidification of soil Neutralization of soil
47 The overall effect of the photochemical smog in the after noon is built up of Neutralization oxidizing agent Reducing agent Activating agent
48 Cane sugar on hydrolysis gives Glucose and glucose Glucose and lactose Fructose and fructose Glucose and fructose
49 Cellulose is formed from D-galactose units 50% of D-glucose and 50% of L-glucose units L-glucose units D-glucose units
50 Thrombin is locally used to stop Heart disease Bleeding Blood None of these
51 Soaps are basically salts of Glycerol Triglyceride Fatty acid Fat
52 Which of the following species is used to formation of glycerol fatty acid from triglyceride NaOH Ni Lipase All
53 The primary building blocks of lipids are Fatty acid Glycerol Sterols All
54 Raffinose is a trisacharirde composed of monosaccharide is Glucose Glactose Fructose All
55 Which of following is NOT use the polyvinylacetate (PVA) An adhesive material Binder for emulsion Used as gramophone None as these
56 Which of the following is NOT thermoplastic PVC pipes Plastic toys Varnish Both A and B
57 Which of the following is a molecular formula of vinyl acetate C<sub>4</sub>H<sub>6</sub>O<sub>2</sub> C<sub>2</sub>H<sub>4</sub>O<sub>2</sub> C<sub>4</sub>H<sub>6</sub>O<sub>3</sub> None of these
58 Properties of polymeric material depends upon Chemical composition Structure of molecule Boiling point Both A and B
59 If a polymer has mass 63000, and the molar mass of repeating unit is 63 what is its degree of polymerization is 10<sup>3</sup> 10<sup>2</sup> 10<sup>5</sup> None of these
60 Which of the following folymer is used as binder PVC PVA Acrylic resins Polyester
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