MDCAT Chemistry Online Test With Answers

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MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Octyl acetate has the flavor of Orange Pineapple Banana Apple
2 Methyl cyanide, on boiling with mineral acids yield Acetic acid Formic acid Propanoie acid Butanoic acid
3 The formation of ester from acetic aciad in presence of acid and ethanol is a Nucleophilic substitution reaction Nucleophilic addition reaction Electrophilic substituion reaction Electrophilic addition reaction
4 Primany aleohols sornally give us aldehyde when oxidized in the presence of acidified Na2Cr2O7, what will be the product, when the secondary alcohols are oxidized in same condition? Alkenes Alkyl halide Alkynes Ketones
5 An acid that exists as a cyclic dimer in benzene and shows a molar mass of 120g/mol is СН3СOOH HCOOH CI2CHCOOH Сl3CCOOH
6 Velaric acid is obtained from a herb velarian, its IUPAC name is Propionic acid Pentanoic acid Butyric acid Caporic acid
7 The Complete oxidation of ethanol produces first Ethanal than Ethanal Propanone Ethanoic acid Benzoic acid
8 Esters have fruity smell and are used as artificial favours. Amyl acetate gives flavour of Banana Jasmine Pineapple Orange
9 All are dicarboxylic acids except Oxalic acid Malonic acid Picric acid Tartaric acid
10 In the presence of hot alkaline potassium permanganate solution 2-butene will give Formic acid +acetic acid Two moles ethanoic acid Two moles of methanoic acid Ethylene glycol
11 One of the following compound reacts with its own oxidation product (an oxidation involves no loss of carbon) to give sweet odour liquid Propanal Propanone 1-propanol Propanoic acid
12 Ethanoic acid reacts with all of these to produce water except Ethanol Sodium Caustic soda Sodium hydrogen carbonate
13 The specie that develops strongest hydrogen bonding with water НСООН B.CH3CH2СООН CH3СООН CICH2COOH
14 Which one of the following will react with bothethand and ethanoic acid at room temperature CaCO3 CuO Na-metal CH3OH
15 Which of the following has the lowet solubility in water НСOOH CH3СООН CH3-CH2-СООН C3H7-COOH
16 Slight oxidation of primary alcohol eives Ketone Aldehyde -Organic acid An ester
17 Reaction of acetic acid with LiAIH4 gives Ethanol Ethanal Ethane Ethyl acetate
18 A compound X has all of the properties below. It is a liquid at 25°C it mixes completely with water it reaets with aqueous sodium hydroxide, What could X be? <sub>Ethanoic acid</sub> Ethene Ethanol Ethyl ethanoate
19 Oils and fats belong to the class of Alcohols Hydrocarbons Acids Esters
20 Ethanoic acid reacts with PCI5, to give ethanoyl chloride. HCI and a third compound What is the third compound H3PO3, POCI3 SO2 COCl2
21 Compound X & Y give effervesce with Na2CO3, solution. X gives a white ppt with ammonical AgNO3 while Y gives sweet smell compound on heating with alcohol X &Y are Formic acid &amp; acetic acid Acetone &amp; formic acid Acetaldehy de &amp; acetic acid Acetic acid &amp; acetone
22 Which of the following is a strong acid CH3COOH C2H5OH HCOOH Phenol
23 In the esterification, first attack is due toon carborylic acid Hydrogen ion Alcohols Water All
24 Which compound is not formed as a result of reaction between acetic acid & HI & red phosphorous Ethanol Water lodine Ethane
25 Which of the following acid is unsaturated carboxylie acid Malonic acid Oxalic acid Succinic acid Maleic acid
26 Which of the following metal cannot evolve hydrogen from the acetic acid Sodium Potassium Magnesium Copper
27 The derivatives that cannot be prepared directly from the acetie acid Acetamide Acetic anhydride Ethyl acetate Ester
28 Estyl butyrate has flavour like Banans Jasmine Pineapple Orange
29 Ester with raspberry flavor Amyl acetate Isobutyl formate Amyl butyrate Octyl acetate
30 Acetic acid reacts with thionyl chloride to form acetyl chloride, which species acts as nucleophile in the reaction SO3 SO2 Cl- No nucleophile is formed
31
Carboxylic acids reacts with sodium carbonate, & gas evolved in this reaction
 CO2 H2 CO Both a &amp;b
32 An organic compound made from oxidation of ethanol is Formic acid Acetic acid Malonic acid Citric acid
33 2-propanol on Oxidation gives Aldehyde Carboxylic Acid Ketone Alcohol
34 An alcohol is converted to an aldehyde with same number of carbon atoms as that of alcohol in the presence of K2Cr2O7/H2S04 the alcohol is CH3C(CH3)2OH (CH3)3COH <div>CН3СН2СН2OH</div><div><br></div> (CH3)2CHOH
35 The oxidation of 1 - propanol in the presence of H2SO4, +K2Cr207 produces final product Acetaldehyde Propanal Acetone Propanoic acic
36 The conversion of tertiary alcohols into alkenes in the presence of K2Cr2O7 + H2SO4 is Addition reaction C-H bond cleavage Elimination reaction Combustion reaction
37 When wine is put in air, it becomes sour due to Oxidation of C2H5OH Formation of C2H5NH2 Reduction of C2H5OH Dissolution of CO2
38 Oxidation of secondary alcohol produces Aldehyde Ketone Alkyl halide Ester
39 2-propanol on oxidation yield Propionaldehyde Propanone Propanal Butanal
40 Identify the compound, which give iodoform test Methanol 3- Hexanol Methyl ketone Propionaldehyde
41 To distinguish aldehyde from ketone which solution is used Alkaline solution Fehling's solution A solution containing K2Cr2O7 A solution containing acid only
42 Which reagent is responsible for the conversion of ketone to secondar alcohul NaAlH NaBH4 Al Red P
43 .Both aldehydes and ketones are planar to the neighborhoods of carbonyl (C-0) group. Which one of the following bonds is distorted towards the oxygen atoms? pi-bond of C and O Sigma bond of C and O Sigma bond of C and H Sigma bond of C and C
44 A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product? Aceton3 Dimethyi ether Acetic acid Acetaldehyde
45 Consider the following reaction
R-CHO + 2Ag(NH3)2OH + R-COONH+ +2Ag+2NH3+H2OThis reaction represents		 Fehling test Ninhydrin test Benedict lest Tollen's test
46 Acetaldchyde and ketone form addition product with Phenyl hydrazine Hydroxylamine Hydrazine hydrogen cyanide
47 In aldehydes and ketones carbon of carbonyl group is; sp³ hyhridized sp² hybridized sp hybridized un hybridized
48 When calcium formate and calcium acetate are dry heated they form НCOOH C2H5OH CH3CHO HCHO
49 Which of the following gives positive haloform test and positive Fehling solution Acetone Echanol Acetaldehyde Formaldehyde
50 The reagent used to distinguish between ethanol and propanal is I2/ NaOH Benedict's reagent LiAIH sodium nitroprusside
51 The addition compound obtained by reacting acetaldelyde and HCN, when Iydrolyzed gives Ethyl alcohol Methyl cyanide 2-Hydroxy propanoic acid Ethyl cyanide
52 The reaction of formaldehyde with HCN is Nucleophilic substitution Electrophilic substitution Nucleophilic addition Free radical addition
53 Propanone does not undergo Oxime formation Reduction of Fehling solution Hydrazone formation with hydrazine Reaction with HCN
54 Which of the following reagents reaet in same manner with HCHO, CH3CHO andCH3COCH3 HCN Cu2(OH)2/ NaOH Ammonical AgNO3 Cu(OH)2 only
55 Which of the following alcohol cannot be produced by treatment of aldehydes or ketones with NaBH4 I-propanol 2-Methyl-2-propanol 2-propanol Ethanol
56 Which of the following ketone will not give iodoform test Methyl isopropyl ketone Dimethyl ketone Ethyl isopropyl ketone 2-hexanone
57 In which of the following types of reactions are the carbonyl compounds and alkene are similar in behaviour Nucleophilic addition Electrophilic addition Nucleophilic suhstitution Catalytic hydrogenation
58 Which of the following gives silver mirror with ammonicaT AgNO3 <div>Benzyl alcohol</div> Benzene Benzoic acid Benzaldehyde
59 Which of the follwing dnes not give brick red precispitate wits Fehling's solution Acetaldehyde Formalin prorionaldehyde Acetone
60 Which of the following does not give yellow precipitate with I2+ NaOH Acetone Benzaldehyde Acetildehyde Acetophenone
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