MDCAT Chemistry Online Test With Answers

MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 A molecule of polysacharide on hydrolysis produces __________of molecules of monosacharide,
 2 - 10<br> 3 &gt;10 2
2 Keratomalacia is caused due to the d3eficiency of vitamin:
 A <br> B K D
3 Which one of the following organic acids is made fork methanol?
 propanoic acid <br> butanoic acid <br> formic acid <br> acetic acid <br>
4 A complete food contains at least:
 three nutrients <br> ten nutrients <br> six nutrients <br> eight nutrients <br>
5 An amino acid exists in the form of Zwitter-ion Which has:
 one - ve charge <br> one + ve charge <br> two + ve carges <br> one + ve and one -ve<br>
6 Which substances do nto react immediately with bromine water:
 ethane <br> benzene <br> ethene <br> phenol <br>
7 Coenzymes are the species which increase the activity of enzymes. They are chemically:
 metal ions <br> none - metals <br> organic acids <br> organic bases <br>
8 Sponification is the hydrolysis of fats or oil with an/a:
 enzyme <br> me5tallic ion <br> acid <br> alkali <br>
9 The optimum PH value fro the enzyme pepsin is:
 10 1.4 2 8
10 Which is the optimum temperature  for the activity of enzyme?
 20 - 35°C<br> 10 -15°C<br> 55 - 70°C<br> 35 - 55°C<br>
11 Starch  is a polymer is of:
 sucrose <br> fructose <br> α-D-Glucose <br> lactose <br>
12 Nylon 6,6 is a condensation polymer of:
 Phthalic acid and hexa ethylene diamine <br> adipic acid and hexaethylene diamine <br> phthalic acid and glycerol <br> phthalic acid and glycerol <br>
13  Which one among the following is not a natural polymer?
 protein <br> cellulose <br> nylon <br> nucleic acid <br>
14 Plastics are a pollution problem because may plastics:
 burn to produce toxic fumes <br> decompose to produce tocxic products <br> are made from petroleum <br> are very inflammable <br>
15 The mechanism of polymerization involves free addition Polymerization or condensation polymerization, Choose the correct statement:
 Polyester is an addition polymer <br> polythene is an addition polymer <br> polyviny chloride (PVC) is a condensation polymer<br> Polystyrene <br>
16 Thermoplastic polymer can be softened and hardened when cool repeatredly, Which one is not a thermoplastic among he following?
 epoxy resin <br> PVC <br> Plastic toys <br> none of all <br>
17 Lipids are naturally occurring compounds produced in cell and are water insoluble but soluble in organic solvent one of the following is not a lipid, Select among the following:
 nucleic acid <br> atriglceride <br> sterol <br> vitamin D<br>
18 A fat  or oil is characterized for extent of unsaturation by one of the following number. Which one is:
 acid number <br> saoilucfucation umber <br> rancidity number<br> iodine number <br>
19 Choose an addition polymer among the following:
 terylone <br> nylon 6,6 <br> polystyrene <br> epoxy resin <br>
20 Which one of the following is not type of polymer:
 copolymer <br> homopolymer <br> terpolymer <br> hereropolymer <br>
21 Which one of the following statements about glucose and sucrose is incorrect:
 both are soluble in water <br> both are naturally occurring <br> both are carbohydrates <br> both are disacharides<br>
22 The reaction between fat and NaOH is called:
 esterification <br> hydrogenolysis <br> fermentation <br> sponification <br>
23 Which one of the following enzymes brings about the hydrolysis of fats?
 urease <br> maltase <br> zymase <br> lypase <br>
24 Which one of the following is a water soluble vitamin?
 niacin <br> rioflavin <br> trypsin <br> ascorobic acid <br>
25 Which of the following is not a carbohydrate?
 nuclic&nbsp; acid <br> strach <br> glycoyen <br> cellulose <br>
26 One of the following is not a biopolymer,Point out that one:
 lipid <br> starch <br> diamond <br> protein <br>
27 The structure of a polymer depends upon how the monomer-repeating unit joins to makes a polymer, What is not the type of structure of a polymer?
 synthetic polymer<br> linear polymer <br> branched <br> cross linked or inter connected polymer <br>
28 Which one of the following element is not present in all proteins?
 carbon <br> hydrogen <br> nitrogen <br> sulphur&nbsp; <br>
29 Vegetables oils are:
 unsaturated fatty acids <br> glycerides of unsaturated fatty acids <br> glycerides of saturated fatty acids <br> essential oils obtained from plants<br>
30 A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called:
 fiber <br> plastic <br> varnish <br> polyamide resin <br>
31 The fiber which is made from acrylonitrile as monomers:
 PVC rayon fiber <br> acrylic fiber <br> Polyester fiber <br>
32 Cholesterol is a precursor of steroid hormones, Choose the class of steroid:
 a carbohydrate <br> a hydrocarbon <br> a natural lipid<br> a protein a hydrocarbon <br>
33 Macromolecules or polymers are large molecules built up from small m0lecules known as monomers.This hypothesis put forward by:
 Newton <br> schrodinger <br> Lewis <br> Stadinger<br>
34 The molecular mass of a polymer is obtained by multiplying mass of the monomer unit with the degree of polymerization, The degree  of polymerization of PVC is 1000.What is molecular mass?
 65000 63000 62000 60000
35 Plastics are pollution problem because many plastics:
 are made from petroleum <br> are very inflammable <br> burn to produce toxic fumes<br> decompose to produce toxic products <br>
36 Which of these polymers is a synthetic polymer?
 animal fat <br> starch <br> cellulose <br> polyester <br>
37 Which of these polymers is an addition polymer?
 nylon 6,6<br> Polystyrene <br> terylene <br> epoxy resin <br>
38 Chloroethene, CH2 = CHC/ is the monomer of PVC.
What are the C-C-C bond angles along the polymeric chain in PVC?
 They are all 109.5°<br> half are 109.5° and half are 120°<br> They are all 120° <br> They are all 180°<br>
39 Denaturation of protein means the structure of protein is disrupted indicate which factor does not denature protein
oxidizing agent <br> heat protein <br> keeping pH 7.35 <br> pH changes <br>
40 In which of these processes are small organic molecules changed into macromolecules?
 the fractional distillation of crude oil <br> the cracking of petroleum fractions <br> the hydrolysis&nbsp; of proteins <br> the polymerization <br>
41 Which of these polymers is a synthetic polymer?
starch <br> animal fat <br> polyester in an addition polymer <br> cellulose <br>
42 Which of the following air pollutant is called quiet killer PAN CO NO<sub>3</sub> SO<sub>3</sub>
43 Sulphate aerosols cause severe respiratory problems particularly among Infants Women Young people Old people
44 Which of the following does not contribute towards the formation of photochemical smog? NO SO<sub>2</sub> O<sub>3</sub> Hydrocarbons
45 Which of the following substance is not present in acid rain? Sulphuric acid Nitric acid Sulphurous acid Acetic acid
46 Global warming is mainly caused by ______ radiations UV I.R gama X-rays
47 Amount of fresh water used by agriculture is 2% 23% 69% 97%
48 Ph of unpolluted rain water is 07 Less than 6 5.6 Less than 5
49 SO2 produced by volcanoes is about 75% 67% 69%<br> 70%
50 Heat balance of earth is maintained by Atmosphere Hydrosphere Lithosphere Stratosphere
51 Half of the mass of atmosphere is concentrated above earth at the hieght of 40 Km 25-28 Km 5-6 Km 100 Km
52 Pan is an irritant to human beings and it affects Eyes Nose Hair Skin
53 Coagulation in the purification of water is carried out by Alum NiSO<sub>4</sub> BaSO<sub>4</sub> CuSO<sub>4</sub>
54 How many times a newspaper can be recycled 02 05 08 10
55 Air pollution causes Acid rain O<sub>3</sub>&nbsp;depletion Green House Effect All
56 Dissolved impurities of potable water can be separated by the process of reduction Aeration Electrolysis Co-angulation
57 White marble buildings are effected by? O<sub>2</sub> SO<sub>2</sub> CI<sub>2</sub> CFC<sub>s</sub>
58 During incineration temperature range of non-rotating chamber is 900-1000C° 650-1100C° 950-1300C° 700-900C°
59 Transformation is a cyclic process in which used plactic is Remelted and styrene is added Converted into low quality substance Converted back into original components None of these
60 Water is considered pollutant when value of Do is 6 PPM 8 PPM 03 PPM 10 PPM
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