Chemistry Fundamentals of Organic Chemistry MCQs Chapter 7 Class 12 - PLS Academy

Chemistry Fundamentals of Organic Chemistry MCQs – Chapter 7 Class 12

Chemistry Fundamentals of Organic Chemistry is an important chapter of Class 12 Chemistry and plays a significant role in FSc Part-II exams and entry test preparation. MCQs from this chapter are frequently included in MDCAT, NUMS, AKU, NUST, UET ECAT, and board examinations. This chapter covers key topics such as classification of organic compounds, functional groups, nomenclature, isomerism, hybridization, and general reactions of organic compounds.

PLS Academy

Get Access to 20 thousands+ MCQs Including Topical MCQs, Practice Tests, Mock Tests, Solved Past Papers, Flashcards, Notes, FLPS, and Much More.

UNLOCK PREMIUM🔐

3866

Created on February 10, 2022 By Ali Durrani

Chemistry Ch 7 Class 12 Fundamental Principles of Organic Chemistry

This is the Free Access to Limited MCQs. Enroll to PLS Boost Premium Bundle to Get More MCQs HERE

1 / 56

Example of a nucleophile is:

NUMS 2019 Cancelled
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) BF3

B) AlCl3

C) SO3

D) CN

2 / 56

Maleic Acid and Fumaric Acid are:

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Cis-Trans isomers

B) chain isomers

C) position isomers

D) metamers

3 / 56

Which process is used to produce volatile compounds?

Reforming

Cracking

Polymerization

Distillation

4 / 56

Which of the following has the lowest vapour pressure at 20 degrees Centigrade?

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Diethyl ether

B) Chloroform

C) Carbon tetrachloride

D) Water

5 / 56

The active part in organic molecules is called:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Homologous series

B) Functional group

C) Chemical bonding

D) Ionic complex

6 / 56

Wohler prepared urea from:

Bakelite

Cyanic acid

NH4CNO

Formaldehyde

7 / 56

(HCHO)nH20 is the chemical formula for?

NTS 2015 SMBBMC
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Formic acid

B) Paraformaldehyde

C) á – methyl propionaldehyde

D) Propionic acid

8 / 56

Which of the following compounds has the empirical formula, (CH2O) and reacts with sodium hydroxide?

NUMS 2019 Cancelled
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Carbonic acid

B) Ethanol

C) Acetic acid

D) Methanoic acid

9 / 56

Which of the following is the correct IUPAC name?

NTS 2016 SMBBMC
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) 3 – Ethyl – 4, 4-dimethylheptane

B) 4,4 – Dimethyl – 3 – ethylheptane

C) 5 – Ethyl – 4, 4 – dimethylheptane

D) 2, 3 – diethylheptane

10 / 56

IUPAC name of C6H5 – CH2 – CH2 – NH2 is:

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) 2-phenyl ethenamine

B) 2-phenyl ethanamine

C) 2-phenyl ethylamine

D) 3-phenyl ethanamine

11 / 56

Which of the following is/are organic?

Protein

Carbohydrates

Both a and b

None of these

12 / 56

An essential condition for the Optical Activity of an organic compound is:

NUMS 2015
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Dextrorotatory

B) Levorotatory

C) Presence of an asymmetric carbon

D) Molecular dysymmetry

13 / 56

Propyl Acetate and valeric acid are which type of isomers

NUMS 2018
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Tautomers

B) Functional

C) Position

D) Metamers

14 / 56

Which of the following has shortest C – C bond length?

Acetylene

Methyl Alcohol

Benzene

Methane

15 / 56

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Functional isomers

B) Position isomers

C) Chain isomers

D) Metamers

16 / 56

How many chain isomers can be obtained from the alkane C6H14?

NTS 2016 DUHS & JSMU
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) 7

B) 6

C) 5

D) 4

17 / 56

The isomers must have the same:

NTS 2013
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Physical properties

B) Molecular Formula

C) Structural Formula

D) Chemical properties

18 / 56

The type of isomerism existing in a compound of molecular formula C2H6O is:

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Functional group

B) Position

C) Chain

D) Metamerism

19 / 56

The rate of E1 reaction depends upon:

NTS 2019
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) The concentration of the substrate

B) The concentration of the nucleophile

C) The concenıration of the nucleophile and the substrate

D) The amount of the solvent used

20 / 56

Which one of the following free radical is most stable:

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) CH3*

B) (CH3)2CH*

C) (CH3)3C*

D) C2HS*

21 / 56

Which one is not an organic compound?

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Fats

B) Water

C) Carbohydrates

D) None

22 / 56

Which of the following is not an isomer of other three:

2,2-Dimethyl pentane

2-Methylhexane

2,3- Dimethyl pentane

2,2- Dimethyl butane

23 / 56

Which is not a meta directing group:

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) -NO2

B) -COOH

C) -NH2

D) -COR

24 / 56

Which one is NOT a nucleophile?

NUMS 2019 Reconduct
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) BH3

B) NH3

C) -NH2

D) -OH

25 / 56

CH3CH2CH2COCH3 is the functional isomer of:

NTS 2016 DUHS & JSMU
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) CH3CH2CH2CH2CHO

B) CH3CH2CH2CH2OH

C) CH3CH2COCH2CH3

D) CH3 – (CH)2 COCH2CH3

26 / 56

Proton transfer within a molecule is known as:

Position isomerism

Tautomerism

Metamerism

Isomerism

27 / 56

Which of the following pair groups belong to meta directing Groups?

NTS 2019
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) NH2 and -NO2

B) -OR and -OH

C) -NO2 and – SO3H

D) CI and -COOH

28 / 56

Ethers show the phenomenon of:

NTS 2019
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Position isomerism

B) Functional group isomerism

C) Metamerism

D) Cis-trans isomerism

29 / 56

In alkanes, each carbon has hybridization:

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) sp3

B) sp

C) sp2

D) dsp

30 / 56

Example of metamerism is:

Dimethyl ether and methyl alcohol

1-Butene and 2-Butene

Diethyl ether and methyl n-propyl ether

n-pentane and iso-pentane

31 / 56

Example of nucleophile is:

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) BF3

B) SO3

C) AlCl3

D) CN

32 / 56

IUPAC name of the compound (CH3)2-CH-CH(C2H5)-C(CH3)3 is :

NTS 2015 SMBBMC
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) 3-ethyl-2,2,4-trimethyl pentane

B) 3-ethyl-2,2,4-trimethyl pentene

C) 3-ethyl- 2,4-dimethyl pentane

D) 4-ethyl, 3 methyl hexane

33 / 56

Isomerism is:

Same molecular formula but different structure

Same molecular formula and same structure

Different molecular formula but same structure

None of these

34 / 56

Which class of compounds cannot show positional isomerism?

PMC Sample 1
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) alkane

B) alkene

C) alkyne

D) alcohol

35 / 56

In a resonance structure of a molecule

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Pairing scheme should be same

B) Arrangement of atoms should be same

C) Energy should be same

D) All are true

36 / 56

In SN1 reaction “1” stands for?

NTS 2016 SMBBMC
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Polar solvents

B) Unimolecular

C) Bimolecular

D) Nucleophile

37 / 56

Select the organic compound which belongs to Arene family:

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) CH2 = CH2

B) CH3 – O – CH3

C) CH3 – NH2

D) C6H6

38 / 56

IUPAC name of Divinyl acetylene is:

NUMS 2019 Reconduct
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) 1, 5 – Hexadiyne – 3 – ene

B) 1, 5 – Hexadiene 3 – yne

C) 3 – Hexene – 1,5 – diyne

D) 3 – Hexyne – 1 , 5 – diene

39 / 56

Na, Ca & Mg are

Organic

Inorganic non-metals

) Inorganic metals

Organic metals

40 / 56

IUPAC name of this is (CH3)2 – CH – CH (C2H5) – C(CH3)3

NTS 2016 DUHS & JSMU
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) 3-ethyl-2, 2, 4-trimethyl pentane

B) 4-ethyl-2, 2, 4-trimethyl pentane

C) 5-ethyl-2, 2, 4-trimethyl pentane

D) 2-ethyl-2, 2, 4-trimethyl pentane

41 / 56

The number of isomers of C3H7-Cl are _______

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) 2

B) 3

C) 4

D) 6

42 / 56

Which of the following is an organic compound?

Explosives

Paper

Plastic

All of these

43 / 56

The type of isomerism in which the position of functional group changes is called?

Tautomesrism

Cis-Trans Isomerism

Funcricinal Group Isomerism

Metamerism

44 / 56

Which one of them is used as an automobile antifreeze

PMC Sample 1
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Ethanol

B) ethene

C) ethylene glycol

D) propene

45 / 56

Aromatic compounds burn with a sooty flame because:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) They are resistant to react with oxygen

B) They have a cyclic structure

C) They have a high percentage of Carbon

D) They have a high percentage of hydrogen

46 / 56

Diethyl ether and n-butanol are:

NUMS 2019 Reconduct
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Position isomers

B) Functional group isomers

C) Chain isomers

D) Tautomers

47 / 56

Isomerism due to shifting of proton from one atom to another in a same molecule is known as:

NUMS 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Metamerism

B) Tautomerism

C) Position

D) Functional

48 / 56

Carbonyl group is present in

Glycol

Glycerol

Dihydrid alcohol

None of these

49 / 56

78 g of a hydrocarbon occupies 22.414 ml of volume at S.T.P. The empirical formula of the hydrocarbon is CH. The molecular formula of this hydrocarbon is:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Stoichiometry
Analytical Chemistry
Elimination Tool:

A) C2H4

B) C6H6

C) C8H8

D) C4H4

50 / 56

The coal used for domestic purposes is: –

Lignite

Anthracite

Bituminous

Sub bituminous

51 / 56

Which of the following is the reducing agent:

NUMS 2015
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) C3H8

B) C2H5COOH

C) C3H7OH

D) (CH3)2CO

52 / 56

C6H5C≡N and C6H5N≡C exhibits which type of isomerism:

NTS 2015 SMBBMC
Biology
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Functional group isomerism

B) Positional isomerism

C) Skeletal isomerism

D) Metamerism

53 / 56

Study that deals with hydrocarbons and its derivatives Is known as:

Inorganic chemistry

Organic chemistry

Analytical chemistry

Physical chemistry

54 / 56

Which of the following intermediate has the complete octet around the carbon atom.

NUMS 2018
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Free radical

B) Carbanion

C) Carbonium ion

D) None of these

55 / 56

Formyl group is present in

PMC Sample 1
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Aldehydes

B) ethers

C) thiol

D) acetone

56 / 56

Which functional group is not a double bond?

NUMS 2019 Cancelled
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) Ethers

B) Aldehydes

C) Ketones

D) Esters

Your score is

The average score is 62%

Importance of Fundamentals of Organic Chemistry MCQs

A strong understanding of the fundamentals of organic chemistry helps students identify organic compounds, predict reactions, and solve conceptual and numerical problems. Exams often include MCQs on functional groups, types of isomerism, and reaction mechanisms. Practicing chapter-wise MCQs improves conceptual clarity, accuracy, and confidence for competitive exams.

Effective Strategy for Free Preparation

For effective preparation, students should revise functional groups, nomenclature rules, and reaction types regularly, and solve topic-wise MCQs consistently. Attempting free tests and past paper questions helps identify important concepts and repeated exam patterns. PLS Academy provides structured MCQs and free resources to support Chemistry Fundamentals of Organic Chemistry preparation and other Class 12 Chemistry chapters.

JazakAllah