MDCAT Chemistry Online Test With Answers

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MDCAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Which of the following compound is least reactive HCHO CH3CHO CH3COCH3 C6H5CHO
2 Which of the following test is not given by aldehvde 2. 4 DNPH test NaHSO3 test Tollen's test Sodium nitroprusside test
3 The red brown ppt. of Fehling solution and benedict solution tests are of Ag Cu2O CuO AgBr
4 which of the following is not a symmetrical ketone 4-heptanone Butanone Propanone 3-pentanone
5 Reactivity of carbonyl compounds is due to Electrophilic carbon Less stearic hindrance Unsaturation of Co Polarity of bond
6 C=O and C=C bonds are differentiated by Hybridization of C-atom Bond angles Ammonical AgNO3 <span style="font-size:11.0pt;line-height:115%; font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;mso-fareast-font-family:SimSun;mso-bidi-font-family: &quot;Times New Roman&quot;;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN; mso-bidi-language:AR-SA">Conc. HNO3</span>
7 Formalin is used as: Fungicide Germicide Sterilizing of surgical instruments All three
8 Which one of the followings is resistant to oxidation under normal conditions Methyl alcohol Acetaldehyde Ethyl alcohol Acetone
9 Acetone reacts with HCN to form a cyanohydrin. It is an example of Nucleophilic addition Electrophilic substitution Electrophilic addition Nucleophilic substitution
10 Acetaldehyde cyanohydrin upon hydrolysis prodnces Tartaric acid Malonic acid Formic acid Lactic acid
11 Formalin contains-------% alcohol. 37 80 8 52
12 Which of the following will undergo nucleophilic addition reaction more easily? Aldehyde Alkene Aldehyde and ketone equally Neither aldehyde nor alkenes
13 What forces operate between ethyl group of ethyl alcohol and oxygen of water H-bonding attractive forces repulsive forces dipole forces
14 Which will not react with phenol NaOH Br2 KMn04/OH- Na
15 Alcohol is less acidie than phenol due to higher ka value Instability of alkoxide ion stability of carbocation Stability of phenol
16
Formation of Picric acid from phenol needs heating, one possible reason for it is
 acidity of phenol e- donating nature of-OH acidity of picric acid e- with drawing effect of- NO2
17 An electron with drawing group attached to e-position in phenol makes it basic Stabilises the phenoxide ion decreases its basicity allows it to precipitate in aqueous solution
18 What is true about an alcohol and phenol Both are more acidic than water Both react with NaOH Both produce CO2 with Na2CO3 Both, produce H2 with Na
19 Which reactant does hnof liberate water on reaction with alcohol NH3 K2Cr2O7/15H2O HCI PCI3
20 The compound that reacts the slowest in Lucas test 1-Pentanol sec-butyl alcohol 3-Pentanol ter- butyl alcoho
21 Esterification of CH3COOH isreaction Acid base Electrophilic Redox Nucleophilic
22 The alcohol that does not form curbonyl compound on oxidation iso-butyl alcohol neo pentyl alcohol Ethanol ter-butyl alcohol
23 Tertiary alcohols have alpha bydrogens 1 Zero 2 3
24
1, 3, 5-Pentanetriol has secondary carbon
 3 1 2 Zero
25 CH3CH2CH2OH--------A---------B Here B is Propyne Propanal Propene Propane
26 The synthesis of ethene from ethyl alcohol is a reaction Dehydration Polymerization Addition Substitution
27 The number of resonating structures of phenoxide ion are 3 5 6 4
28 The strongest conjugate base is OH- CH3O- C6H5O- CH3COO-
29 One of the following can produce greater number of moles of ethyl chloride on reacting with escess of ethanol PCI5 PCI3 HCI/ZnCl2 SOCI2
30 During esterifcation, the alcobol molecule acts as: Oxidizing agent Electrophile Reducing agent Nucleophile
31 The acidity of phenol is due to its Nature of Benzene Double bond in benzene ring Natute of phenoxide ion Hydroxyl group
32 Reaction of alcohol with hydrogen chloride, in the presence of Zinc chloride yields Ketone Carboxylic Alkyl halide Ester
33 Which one of the following is an appropriate indication of positive iodoform test? Formation of H2O Brick red precipitate Release of H2 gas Yellow precipitate
34 Which one of the following groups is indicated when HCI is formed by reaction of ethanol with phosphorous pentachloride? Amino group Halide group Hydroxyl group Hydride group
35 Which one of the following alcohol is indicated by formation of yellow crystals in lodoform tesr? Methanol Ethanol Butanol Propanol
36 Primary, secondary aad tertiary alcohols can be identified and distinguished by Lucas test lodoform test Baeyer's test Silver mirror test
37 The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives Ethene Alcohol Diethyl ether Carboxylic acid
38 Relative acidic strength of alcohol, phenol, water and carboxylie acid is Carboxylic acid &gt; Alcohol &gt; Phenol &gt; Water Carboxylic acid &gt; Phenol &gt; Water&gt; Alcohol Water &gt; Alcohol&gt; Phenol &gt; Carboxylic acid Phenol &gt; Carboxylic acid &gt; Alcohol&gt; Water
39 ln ethyl alcohol, the bond that undergoes heterolytic cleavage most readily is C-C C-O C-H O-H
40 Which of the following is soluble in water? СН3ОН CCL4 CHCI3 CS2
41 Which one of the following is more acidic Phenol Carboxylic acid Alcohols Amines
42
Temperature required for the dehydration of ethanol into ethene in the presence of HaSOu is
 130°C 170°C 175°C 180°C
43 Which of the following alcohol is more soluble in H2O Propanol Butanol Pentanol Hexanol
44 Phenol is completely soluble in water above 25°C 62.3℃ 68.5°C 66.50°c
45
Phenol is colourless, crystalline and solid
 Hygroscopie Deliquescent Moistening Odourless
46 Phenol can be diatingushed from ethyl alcohol by all of the following reagents except lodoforrn test Na Br2 /H2O NaOH
47 Which of the substance is not going to react the sodium metal: Acetic acid Methanol Di methyl ether Ethanol
48
Which of the following alcohols is least reactive with respect to 0-H bond
 CH3OH CH-CH2-OH (CH3)2-CH-OH (CH3)3OH
49 The starting substance for the preparation of iodoform is any of the following, except <div>СН3СН(ОН)CН3</div> CH3CH2ОН HCH2OH CH3COCH3
50 Ethanol reacts with sodium metal to liberate CO2 gas CO gas H2 gas Steam
51 Which of the following is more reactive where 0-H bonds break P°alcohol T° alcohol S°alcohol Cannot be predicated
52 Alcohols of low molecular weight are: Soluble in water Insoluble in water Soluble in water on heating Insoluble in all solvents
53 Which is most acidic? H2O C2H5OH C4H9OH CH3-CH2-CH2OH
54 Which alcohol is most reactive towards sodium metal? Ter Butyl alcohol n-Propyl alcolol Isopropyl alcohol Have same reactivity
55 A compound z' decolorizes bromine water and produces white ppt. The compound 'z'is Alkane Alcohol Phenol Benzene
56 Ethyl alcohol reacts with PCL and produces: Haloalkane Alkyl halide &amp; H3PO3, Alkyl halide &amp; POCl3 Alkyl halides &amp;H3PO4.
57 Tertiary aleohols producewith acidified KMno, Ketones Aldehydes Malonic acid Alkene
58 2,4,6-Trinitrophenol is commonly called as Phthalic acid Tartaric acid Malonic acid Picric acid
59 Which of the following undergoes easy dehydration? 3-MethyIbutan-2-ol Ethanol 2.Methylpropan-2-ol Methanol
60 Which of the following reactions does not involve formation of carbocation? SN1 and E1 El and E2 SN1 and SN2 E2 and SN2
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