Chemistry Fundamentals of Organic Chemistry MCQs Chapter 7 Class 12

Created on February 10, 2022 By Ali Durrani

Chemistry Ch 7 Class 12 Fundamental Principles of Organic Chemistry

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1 / 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

2 / 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

3 / 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

4 / 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

5 / 56

The coal used for domestic purposes is: –

Lignite

Anthracite

Bituminous

Sub bituminous

6 / 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

7 / 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

8 / 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

9 / 56

Which of the following is an organic compound?

Explosives

Paper

Plastic

All of these

10 / 56

Which process is used to produce volatile compounds?

Reforming

Cracking

Polymerization

Distillation

11 / 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

12 / 56

Proton transfer within a molecule is known as:

Position isomerism

Tautomerism

Metamerism

Isomerism

13 / 56

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

Inorganic chemistry

Organic chemistry

Analytical chemistry

Physical chemistry

14 / 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

15 / 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

16 / 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

17 / 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

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 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

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

Carbonyl group is present in

Glycol

Glycerol

Dihydrid alcohol

None of these

22 / 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

23 / 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

24 / 56

Which of the following is/are organic?

Protein

Carbohydrates

Both a and b

None of these

25 / 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

26 / 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

27 / 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

28 / 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

29 / 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

30 / 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

31 / 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

32 / 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

33 / 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

34 / 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

35 / 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

36 / 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

37 / 56

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

Tautomesrism

Cis-Trans Isomerism

Funcricinal Group Isomerism

Metamerism

38 / 56

Isomerism is:

Same molecular formula but different structure

Same molecular formula and same structure

Different molecular formula but same structure

None of these

39 / 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

40 / 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

41 / 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

42 / 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

43 / 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

44 / 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

45 / 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

46 / 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

47 / 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

48 / 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

49 / 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

50 / 56

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

Acetylene

Methyl Alcohol

Benzene

Methane

51 / 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

52 / 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

53 / 56

Na, Ca & Mg are

Organic

Inorganic non-metals

) Inorganic metals

Organic metals

54 / 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

55 / 56

Wohler prepared urea from:

Bakelite

Cyanic acid

NH4CNO

Formaldehyde

56 / 56

Example of nucleophile is:

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

A) BF3

B) SO3

C) AlCl3

D) CN

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Chemistry Fundamentals of Organic Chemistry MCQs Chapter 7 Class 12

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