MDCAT Chemistry Online Test With Answers

MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Acidic character of amino acid is due to: -NH2 -N+H2 -COOH -COO-
2 Select the correct acidic strength order of chloro substituted acid. CH3COOH >Cl2CH2COOH>Cl2 CHCOOH>CCOOH CH3COOH>ClCH2COOH>Cl3COOH>Cl3COOH ClCCOOH>Cl2CHCOOH>ClCH2COOH>CH2COOH CH3COOH>ClCH2COOH>Cl2CHCOOH>Cl3CCOOH
3 Compounds having -CH group are called as Cyano compounds Nitro compounds Carbon nitrogen compounds Nitriles
4 In the reaction ? represents which one of the following products. Ketone Aldehyde Formic acid Ether
5 Which one of the following compounds will give idoform test on treatment with aqueous iodine? 3-pentanone Propanone Propanal Butanal
6 The reaction of aldehydes and ketones with ammonia derivatives G-NH3 to form compounds containing >C=N-C and water is known as_______ reaction. Nucleophilic addition Electrophilic addition Electrophilic substitution Nucleophilic substitution
7 Ethanol react with HCN to form cyanohydrin, it is an example of. Nucleophilic addition Electrophilic addition Electrophilic substitution Nucleophilic substitution
8 The phenoxide ion is more stable than ethoxide ion as Lone pair oxygen atoms overlap with the delocalized bonding system in benzene Oxygen atom is directly bonded with benzene ring in the phmoxide ion The negative charge is localized on oxygen atom of phenoxide ion The negative charge is deloclized on oxygen atom of othoxide ion
9 Alcohol reacts slowly with Na-metal as compared to water because it has low concentration of H+ ion which suggests that it is. Less acidic than water Less basic than phenol More acidic than phenol More acidic than water
10 During the Sn1 reactions, the fast reaction involves. Breakage of covalent bond Formation of carbocation Transition state Atttack of nucleophile
11 In elimination reaction, alcoholic KOH is used -oh in this case will act as. Electrophile Base Leaving group Acid
12 Liquid ammonia has become an important fertilizer for direct application to soil. It contains ____________ nitrogen. 46% 82% 14% 17%
13 The reaction of bromine with benzene in the presence of FeBr3 follows the mechanism of Electrophilic addition Nucleophilic substution Electrophilic substitution Nucleophilic addition
14 When benzene reacts with acetyl chloride in the presence of AlCl acetophenone is formed.The electrophile in this reaction will be. CH3 C+O AlCl3 C+H2 CH3 COCl
15 Which of the following are 3,5 (meta) directing group when second group is introduced in them.
I = NH3 II= -CHO III= - COOH IV=-CH3
 II,III and IV II and III I and IV I ,II and IV
16 The type of structural isomerism which arises due to the difference in nature of carbon chains or carbon skeleton is. Chain Isomerism Position Isomerism Sis-Trans Isomerism Optical Isomerism
17 Which one of the following is used as a typical catalyst for catalytic cracking. C Mixture of SiO2 and Ni Mixture of Pt and Cu Mixture of Fe and MgO Mixture of SIO2 and Al2O3
18 Nitrogen gas reacts under _________ conditions Standard Normal Cool Harsh
19 Violet colour of [Ti(H2O)]4 ion is due to. Central metal ion Complex ion Water molecule Outer anion
20 Scandium has atomic number 21, which one will be its electronic configuration. 1s<sup>2</sup>, 2s<sup>2</sup>, 2p<sup>6</sup>, 3s<sup>2</sup>, 3p<sup>6</sup>, 3d<sup>1</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>1</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>.4p<sup>1</sup> 1s<sup>2</sup>, 2s<sup>2</sup>, 2p<sup>6</sup>, 3s<sup>2</sup>, 3p<sup>6</sup>, 4s<sup>1</sup>,4p<sup>2</sup>
21 Which noble gas is alpha emitter? Xenon Radon Krypton Argon
22 In elimination reaction , alcoholic KOH is used - OH in this case will act as. Electrphile Base Leaving group Acid
23 The non-stick lining of pans is. Diffluoroethane Chlorofluororylhane Chloroethane Tetrafluoroethane
24 Which one of the following is halothane. Cl-CH2-CH2-Cl2 CF-CHCl-Br CL-CH2-CH2-CH2-Br Br-CH2-CH2-Br
25 In NO3 the oxidation number of N is. +5 +2 +3 -3
26 Isotopes symbol of ion of sulphur-33 is 33 S-2 . How many no of protons
16
and neutrons are present if the number of electron are 18.
 P=18, n = 15 P = 16 , n = 17 P = 16, n = 16 P= 17, n = 16
27 No of electron in 69Ga3+ will be
31
 28 29 30 34
28 Identify the element that has maximum oxidation states. Zinc Chromium Vanadium Maganese
29 A compound has an empirical formula CH2Cl2 and molecular formula mass as 99 mol-1, identify the compound. C2H4Cl C4H6Cl C2H4Cl2 C2H4Cl3
30 Choose the correct option regarding number of particles associated with one mole of a substance. 6.03 x 10<sup>24</sup> 6.01 x 10<sup>19</sup> 6.02 x 10<sup>21</sup> 6.02 x 10<sup>23</sup>
31 Calculate the grams of H2O formed when 8 g of CH3 burns in excess of oxygen. 21 grams 19 grams 18 grams 15 grams
32 Determine the number of molecule O2 in 10.6 g of NaCO3 0.4 moles 0.3 moles 0.2 moles None of these
33 Halogen are being used as fire extinguisher, mild antiseptic, CFCs and many other organic chemicals. Which of the following halogen is used to kill the bacteria in drinking water. Bromine Fluorine Chlorine Iodine
34 The essential property of a fertilizer is that it should be. Partially soluble Highly soluble In soluble Immiscible
35 Nitrogen is present in air as a major constituent it is an inactive gas in comparison with oxygen which is the next major constituent of air Nonreactive nature of nitrogen is due to the reason. There is one lone pair of electron on each nitrogen atom in its molecule Nitrogen have three unpaired electron i its 2p orbital which is comparatively stable elecrtonic configuration There is a triple covalent bond in nitrogen molecule which in very strong and molecule is polar There is a triple covalent bond in nitrogen molecule which is very strong and molecule is non polar
36 Which of the following would react with ozone in the atmosphere? F Cl O2 O
37 Which of these pollutants is produced by burning of coal and causes acid rain SO2 CO2 CO NO
38 Which is the structure of polyvinyl chloride? [H2C=CH-Cl] -[HCCl-CH-Cl]- -[H2C-CH-Cl]- -[CCl2-CCl2]-
39 Which one will be act as a strong acid. Dichloroethanoic acid Emanoic acid Chloroethanoic acid Trichlorothanoic acid
40 Which product is formed by teh reaction of carboxylic acid with alcohol? Aldehyde Ether Alkane Ester
41 Which mechanism of reaction is shown by carbonyl compounds? Nucleophilic addition Electrophilic substituion Free radical substitution Electrophilic addition
42 Why is it necessary to distill aldehyde formed from oxidation of primary alcohol through acidified potassium dichromate (VI) solution or acidified sodium dichromate (VI) solution. Aldehyde formed may be oxidised further to carboxylic and concerned Aldehyde formed may react with primary alcohol the original reactant Aldehyde formed may be oxidised further to a ketone Aldehyde formed is unstable and decomposed back to original precuser, ie. primary alcohol
43 Which of the following reagents is used to distinguish between aldehydes and ketones.? 2,4 NDPH Bromine Alkaline Iodine Tollen's reagent
44 Alcohol in which carbon atom bonded to OH group is further attached with three alkyl group is Aromatic alcohol Tertiary alcohol Primary alcohol Secondary alcohol
45 Which one of the following compounds is known as tertiary alcohol? 1-Propanol 2-methyl-1 propanol 2-propanol 2-methyl-2-propanol
46 Which one of the following compounds act as catalyst when alcohols react with carboxylic acids. Pt Conc. H2SO5 Conc HNO3 Ni
47 Select one which is alcohol CH3-CH2-OH CH3COOH CH3-O-CH3 CH3-CH2-Br
48 Which compound will be produced by the oxidation of ethanol by acidified K2Cr2O7? Ethanone Ethene Ethanoic acid Ethanol
49 Nylon -6,6 also called Polyvinyl alcohol Polystyren Polyamide Polyester
50 Alcohol in which carbon atom bonded to OH group is further attached with three alkyl group is . Aromatic alcohol Tertiary alcohol Primary Alcohol Secondary Alcohol
51 Which of the following acts as a nucleophile in the reaction of alkyl halide with alcoholic aqueous ammonia? NH3 H+ Br- NO2-
52 What is teh order of increasing reactivity of alkyl halides? Iodoalkane &lt;bromoalkane&lt;chloroalkane&lt;Fluoroalkane Fluoroalkane&lt;Chloroalkane&lt;Bromoalkane&lt;Iodoalkane Iodoalkane&lt;Bromoalkane&lt;Chloroalkane&lt;Fluoroalkane Fluroalkane&lt;Chloroalakane&lt; Bromo alkane&lt;Iodo alkane
53 Which of following compound is solid and room temperature? Ethanal Phenol Butane Methanol
54 Halogen is a halo derivative of Ethanol Methane Methanol Ethane
55 Reaction mechanism of alkanes with halogens is known as Propagation Additon Elimination Free radical substitution
56 Butane molecule can have max no of isomers. 4 5 3 2
57 Which of the following acts as a electrocphile in the electrphilic substitution of benzene.with bromine.? Fe<sup>-3</sup> Br- FeCl<sup>4-</sup> Fe<sup>+2</sup>
58 Which compound is obtained by the elimination of bromopropane? Propene Ethene Propane Butane
59 The species which are produced by electrolytic bond breaking and can act as electron pair donors are known as. Cations Anions Nucleophiles Free radical
60 Ligands having two lone pair of electrons for donation to the central transition metal ion are known as. Bidentate ligands Hexadentate ligands Polydentate ligands Monodentate ligands
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