SMART INSTITUTE NMDCAT CHEMISTRY-3

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Smart Institute NMDCAT Chemistry Quiz

Test your knowledge and skills in chemistry with our comprehensive quiz designed specifically for NMDCAT preparation. This quiz includes a range of questions that cover essential topics and concepts in organic chemistry, ensuring you are well-prepared for the exam.

Participate to enhance your understanding and evaluate your readiness:

Multiple choice questions
Focus on organic reactions and mechanisms
Designed for students and aspiring professionals

60 Questions15 MinutesCreated by StudyingChemistry27

1-Which of the following compound is not heterocyclic?

Pyridine

Thiophene

Phenol

Pyrrole

2-Which of the following structures will not display geometrical isomerism?

CH3CBr=CBrCH3

CH3CH=CHCH3

CH3CH=CHCl

CH3CH=CBr2

3-Which type of reactions are more abundant in organic reactions?

Substitution reactions

Free radical reactions

Addition reactions

Elimination reactions

4-The IUPAC name of CH3-CH(C2H5)-CH2-C(CH3)2-CH3

2,2-dimethyl 4-ethyl pentane

Nonane

2,2-dimethyl heptane

2,2,4-trimethyl hexane

5-The condition for catalytic oxidation of lower alkanes are

Cu, 400 degree Celsius, 200 atm

Organo-nickel

Ni 250 degree celsius

K2Cr2O7/H2SO4

6-Which of the following compounds does not exhibit positional isomerism

Alkynes

Nitroalkanes

Carboxylic acids

Alcohol

7-n-Butane belongs to the

Open chain hydrocarbons

Aliphatic hydrocarbons

Alicyclic hydrocarbons

Both open chain and aliphatic

8-How many structural and cis-trans isomers are there for dichloropropene C3H4Cl2

9-How many esters are possible for C4H8O2

10-Free radicals are characterized by

Paramagnetism

Stability

Diamagnetism

Low reactivity

11-The ease of dehydration of alcohols to produce alkenes is of the order:

3>2>1

2>1>3

1>2>3

3<2<1

12-Dehydrohalogenation of RX occurs in the presence of

An alcoholic base

An alcoholic salt

An alcoholic acid

An alcoholic reagent

13-One mole of hydrocarbon X reacts completely with one mole of hydrogen gas in the presence of a heated catalyst. What would be the formula of X?

C2H6

C5H10

C3H8

C7H16

14-Which of the following test can be used for distinguishing an alkane and an alkene

Bromine water test

Ozonolysis

Hydroxylation

Bromine water and hydroxylation

15-propagation of free radical mechanism takes place by the

Reaction of free radical with free radical

Formation of two free radicals

Consumption as well as production of another free radical

Reaction between two molecules

16-Under which of the following toluene shows side chain substitution reaction

Cl2 in presence of UV light

CH3COCl in the presence of AlCl3

Cl2 in the presence of AlCl3

Hydrogen in the presence of Pt

17-Benzene reacts with benzoyl chloride in the presence of AlCl3 to give

Benzaldehyde

Acetophenone

Benzyl chloride

Benzophenone

18-Among the following compounds which is an aromatic hydrocarbon

Toluene

Bromobenzene

Nitrobenzene

Chlorobenzene

19-In the nitration of benzene with conc. HNO3 + conc. H2SO4, the active species involved is known as

Nitrite ion

Nitrisonium ion

Nitrate ion

Nitronium ion

20-Which ion is least stable carbocation

CH3+

CH3-CH2+

(CH3)2-CH+

(CH3)3-C+

21-Elimination bimolecular reactions involve

First order kinetics

Zero order kinetics

2nd order kinetics

None of these

22-Which statement is incorrect about reactivity of alkyl halides

Greater the bond energy of R-X, lesser the reactivity

Greater the bond polarity of R-X, lesser the reactivity

Greater the bond energy of R-X, smaller the stability

Greater E.N difference of R-X, greater the stability

23-SN1 reactions are favoured in which solvent?

Non-polar

Slightly polar

Polar

All solvents

24-Which compound is most reactive?

(CH3)3CCl

(CH3)2CHCl

CH3CH2Cl

All have same reactivity

25-Neo-pentyl bromide refers to follow which mechanism during substitution reaction

SN1

SN2

Both SN1 and SN2

It does not show SN reactions

26-If an electrophile is the attacking reagent which one would be the most reactive one?

R-F

R-Br

R-Cl

R-I

27-In SN1 reactions, the correct order of reactivity of alkyl halides is

1>2>3

2>1>3

3>2>1

1>3>2

28-Most common reactions shown by alkyl halides are

Substitution reactions

Elimination reactions

Reduction

Polymerization

29-Which of the following reaction requires relatively stronger base to occur. (for a given R-X)

SN1

SN2

Both

Reduction

30-The main factor which decides the reactivity of R-X is

C-X bond strength

Both C-X bond strength and polarity

Boiling point of the given R-X

C-X bond polarity

31-Among halide ions, the poor leaving group is

F-

Br-

Cl-

I-

32- CH3-Cl in the presence of alcoholic KOH forms "A" product. 'A" product is

CH3OH

CH4

CH3OCH3

NO reaction will occur

33-Energetically which is more favourable for an R-X

Substitution reaction

Elimination reaction

Both are equally favourable

Cannot be predicted

34-Which among CH3X, R-CH2-X, R2CHX, R3CX is most reactive towards SN2 reactions

R3CX

R2CHX

RCH2X

CH3X

35-Number of dibromo derivatives of propane are

36-Tertiary butyl alcohol do not undergo dehydrogenation because

It does not contain @-hydrogen

It contains only one -OH group

It contains electron donating groups

Stearic hindrance of alkyl groups

37-The addition of water in propene in the presence of conc. H3PO4 produces

Primary alcohol

Tertiary alcohol

Secondary alcohol

Glycol

38-Which one can be used as test for phenol

C6H5OH + CH3COCl in the presence of aq. NaOH

C6H5OH + HCHO in the presence of NaOH

C6H5ONa +CH3CH2Br

C6H5OH + Br2 (excess)

39-Which inorganic reagent may be used to distinguish between phenol and methanol

Alkaline aqueous I2

Aqueous NaHCO3

K2Cr2O7 in dil. H2SO4

Na metal

40-Which one is not a chracteristics of alcohols

They have higher boiling point than corresponding alkanes

Higher members are colourless and odourless

They are lighter than water

Their solubility in water decreases with increase in in molecular weight

41-Acid catalyzed hydration of alkenes except ethene leads to the formation of

Mixture of 2 and 1 alcohol

2 or 3 alcohol

Mixture of 1 and 3 alcohol

1 alcohol

42-Ethyl hydrogen sulphate undergoes ......... To form ethanol.

Hydration

Hydrolysis

Both

Oxidation

43-Reverse of esterification is called as

Deesterification

Hydrolysis

Hydration

Both hydration and hydrolysis

44-In the oxidation of unsymmetrical ketones using strong oxidizing agents like conc. HNO3 , which carbon atom is preferentially attacked:

Carbon atom maximum number of hydrogen atoms

Carbon atoms with the least number of hydrogen atoms

Alpha carbon

Beta carbon

45-Which of the following has maximum reactivity in nucleophilic addition reactions

Formaldehyde

Acetaldehyde

Propanone

All of these

46-A compound which give both haloform and tollen's test is

Methanal

2-alkanol

Methyl ketone

Acetone

47-Dichromate of which group is used in acetaldehyde formation in laboratory

IIIA

IIA

IVA

48-Acid hydrolysis of cyanohydrin gives

Ketones

@ hydroxy acid

Carboxylic acid

None of these

49-Acetone reacts with 2,4-DNPH to give hydrazone, state of hybridization of carbonyl changes to

Sp3-sp3

Sp3-sp2

Sp2-sp2

Sp2-sp3

50-Which of the following carbonyl compound can give aliphatic, saturated alcohol using NaBH4

Acetophenone

2-butene, 2-ol

Benzaldehyde

3-methyl-2-pentanone

51-If methyl group of propane replaced carboxylic, resulting molecule is

Oxalic acid

Malonic acid

Acetic acid

All

52-Hybridization of functional carbon, change from........to ............ When converting to carboxylic

Sp to sp

Sp to sp2

Sp to sp3

Sp2 to sp2

53-Potassium carbonate decomposed by acetic acid release a gas, the nature of gas is

Basic

Acidic

Neutral

Unpredictable

54-The addition of ethyl alcohol in protonated acetic acid is

Electrophilic

Nucleophilic

Substitution

Oxidation

55-Carboxylic acid derivative having least reactivity is

Ester

Acid amide

Acid anhydride

Acid halide

56-Zigzag and regular coiling of polypeptide linkage forms

Primary proteins

Secondary proteins

Tertiary proteins

Quaternary proteins

57-The hydrogen bond in secondary structure of protein is present between

O-H

C-H

N-H

F-H

58-Which of the following statement is false about protein

Peptide bond is planar

It is polyamide

It contains different sequence of amino acids in different proteins

One of the protein casein is used in bakery products

59-Gelatin is not obtained by

Bones

Blood

Skin

Tendons

60-Which of the following structure of protein is most important for biological activity of proteins?

Primary

Secondary

Tertiary

Quaternary

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SMART INSTITUTE NMDCAT CHEMISTRY-3

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