Complete Organic Chemistry Quiz Batch 07

Organic chemistry is the study of carbon-containing compounds, including their structure, properties, reactions, and applications. It plays a crucial role in pharmaceuticals, polymers, and biological systems. This field explores hydrocarbons, functional groups, and reaction mechanisms essential for understanding chemical processes. Master organic chemistry with in-depth concepts, mechanisms, and practical applications.

1 / 40

What is the primary component of natural gas?

a) Ethane

b) Propane

c) Methane

d) Butane

2 / 40

What is the major product of the reaction between 1-bromopropane and NaCN?

a) Propane

b) Propanenitrile

c) Propanoic acid

d) Propanol

3 / 40

Which of the following best explains why halogens are deactivating but ortho/para-directing in electrophilic aromatic substitution?

A) Halogens withdraw electrons inductively but donate electrons by resonance

B) Halogens are bulky and sterically hinder reactions

C) Halogens act as bases in acidic media

D) Halogens do not participate in resonance

4 / 40

Which of the following is true about the Friedel-Crafts alkylation reaction?

a) It produces an acylated benzene

b) It requires a Lewis acid

c) It is reversible

d) It does not require an electrophile

5 / 40

Which of the following functional groups can be reduced to a primary alcohol using LiAlH4?

a) Carboxylic acid

b) Nitrile

c) Ketone

d) Amide

6 / 40

Which of the following is the most activating substituent for electrophilic aromatic substitution?

A) -OH

B) -NO₂

C) -Cl

D) -CF₃

7 / 40

Which of the following is true about the SN2 mechanism?

a) It is a two-step process

b) It involves a carbocation intermediate

c) It is a concerted mechanism

d) It is favored by tertiary alkyl halides

8 / 40

Which of the following is true about the Gatterman-Koch reaction?

a) It produces benzaldehyde

b) It requires a stable acyl chloride

c) It is a nucleophilic substitution reaction

d) It does not require a catalyst

9 / 40

Which of the following molecules is optically inactive?

a) (R)-2-butanol

b) (S)-2-butanol

c) meso-2,3-dibromobutane

d) (R,S)-2,3-dibromobutane

10 / 40

Cis-trans isomerism in alkenes is due to

(a) chiral carbon

(b) free rotation about single bond

(d) restricted rotation about the double bond

11 / 40

Which of the following is a heterocyclic compound?

a) Benzene

b) Pyridine

c) Cyclohexane

d) Ethane

12 / 40

Which of the following is an example of an addition polymer?

a) Nylon

b) Polyester

c) Polystyrene

d) Epoxy resin

13 / 40

Which of the following compound is more reactive towards nucleophile

Methane

Methanal

Acetone

Ethanal

14 / 40

What is the product of the Wolff-Kishner reduction of acetophenone?

a) Ethylbenzene

b) Toluene

c) Benzene

d) Phenol

15 / 40

Ozonolysis of benzene gives

Glycol

Formaldehyde

Acetaldehyde

Glyoxal

16 / 40

What is the type of isomerism shown by diethyl ether and methyl propyl ether?

a) Chain isomerism

b) Position isomerism

c) Functional group isomerism

d) Metamerism

17 / 40

What is denaturation of proteins?

a) The process of breaking down proteins into amino acids

b) The disruption of protein structure by heat or pH changes

c) The synthesis of proteins from amino acids

d) The folding of proteins into their functional form

18 / 40

How many stereoisomers are possible for 1,2-dichlorocyclohexane?

19 / 40

Which of the following is more acidic: ethane, ethylene, or acetylene?

a) Ethane

b) Ethylene

c) Acetylene

d) All are equally acidic

20 / 40

The product formed in the reaction of propyne with dilute H2SO4 and HgSO4 is

(a) Propyl hydrogen sulphate

(b) Propanone

(d) Propanol

21 / 40

Find the compound with the highest boiling point among the following

(a) n-Butane

(b) n-Octane

(d) 2,2,3,3-Tetramethylbutane

22 / 40

Which of the following reagents can convert a nitrobenzene to an aniline?

A) H₂/Pd

B) Fe/HCl

C) SnCl₂/HCl

D) All of the above

23 / 40

Which of the following reactions is characteristic of carboxylic acids?

a) Aldol condensation

b) Grignard reaction

c) Esterification

d) Cannizzaro reaction

24 / 40

What is the product of the reaction between an arenediazonium salt and water?

a) Phenol

b) Benzene

c) Aniline

d) Nitrobenzene

25 / 40

Cyclopentadienyl cation is

Aromatic

Anti-aromatic

Non-aromatic

None

26 / 40

What is the relationship between cis-2-butene and trans-2-butene?

a) Enantiomers

b) Diastereomers

c) Identical

d) Constitutional isomers

27 / 40

Find the correct order for the ease of formation of free radicals

(a) 1° > 2° > 3°

(b) 3° > 2° > 1°

(d) 2° > 3° > 1°

28 / 40

When ethyne is passed through a red hot tube, _______ is formed

(a) Cyclohexane

(b) Neoprene

(d) Ethane

29 / 40

Which of the following is an alkyl halide?

a) Methanol

b) Benzene

c) Chloroethane

d) Acetic acid

30 / 40

What is the enantiomeric excess (% ee) of a mixture with 60% of one enantiomer and 40% of the other?

a) 10%

b) 20%

c) 30%

d) 40%

31 / 40

Which of the following bases will favor the Hofmann product in an E2 reaction?

a) NaOH

b) KOH

c) t-BuOK

d) NaOEt

32 / 40

Which of the following reagents is used to convert an alkyne to a cis-alkene?

a) H2/Pt

b) H2/Lindlar’s catalyst

c) Na/NH3

d) BH3

33 / 40

Find the alkane (C5H12), which will give only one type of monohalogenated compound

(a) 2,2-dimethylpropane

(b) 2-methylbutane

(d) n-pentane

34 / 40

Acid catalyzed hydration of phenyl acetylene gives

Benzaldehyde

Benzophenone

Acetophenone

Benzoic Acid

35 / 40

What is the role of sulfuric acid in the nitration of benzene?

A) Oxidizing agent

B) Protonates nitric acid to generate NO₂⁺

C) Acts as a nucleophile

D) None of the above

36 / 40

Which one of the following is not a nucleophile

H2O

H2S

BF3

NH3

37 / 40

Which of the following compounds react most readily with Br2(g)?

(a) C2H2

(b) C3H8

(d) C4H10

38 / 40

Which of the following halides is the best leaving group?

a) Fluoride (F⁻)

b) Chloride (Cl⁻)

c) Bromide (Br⁻)

d) Iodide (I⁻)

39 / 40

Phosgene is commonly known as

(a) thionyl chloride

(b) carbonyl chloride

(d) phosphoryl chloride

40 / 40

Baeyer’s reagent is used to detect

(a) glucose

(b) double bonds

(d) reduction

Your score is

The average score is 65%