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MDCAT Fundamental Principles of Organic Chemistry Test Online

Malik TahirLast Updated: May 24, 2025

Chemistry Fundamental Principles of Organic Chemistry MCQS Online Test

MDCAT Chemistry Fundamental Principles of Organic Chemistry Chapter Online Test

Total Questions:	119
Time Allowed:	60 Minutes
Total Marks:	119
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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MDCAT Chemistry Fundamental Principles of Organic Chemistry Test

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Page 1 of 5

Chemistry

1. In benzene carbon – carbon bonds are

Single covalent

Of the order 1.5

3 single and 3 double

Double covalent

2. Which of the following is complex?

CH₄

C₆H₁₂O₆

CaSO₄. 0.5H₂O

(C₆H₁₀O₅)n

3. The method of converting high boiling hydrocarbons into low boiling hydrocarbons is called

Isomerization

Cracking

Polymerization

Condensation

4. The characteristic reactions of alkanes are

Addition reactions

Polymerization

Substitution reactions

Condensation reactions

5. What kind of hybrid orbitals are utilized by the carbon atom in CF₄ molecules?

sp³ d

sp²

sp³

6. Geometry of simple molecule having sp3 hybrid orbital is

Square planner

Triangular

Tetrahedral

Linear

7. Bromoethane can be converted to ethane by

Reaction with aq KOH

Oxidation

Reduction

Reaction with alcoholic KOH

8. On sp3 hybridization

One s and 3 p-orbitals are involved

One p-orbital is involved

Four p-orbitals are involved

All p-orbitals are involved

9. The octane number is 100 for

Isooctane

n-hexane

Neo-octane

Neo-Pentane

10. 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

Metamers

Position isomers

Chain isomers

Functional isomers

11. Choose the species that is incorrectly matched with the electronic geometry about the central atom:

ClO₃¯-tetrahedral

SO₃²¯ - pyramidal

NO₂¯ - trigonal palnar

ClO₄¯ - tetrahedral

12. Replacement of hydrogen atom by – SO₃H group in benzene is called

Acylation

Nitration

Sulphonation

Alkylation

13. Geometry of molecule will be pyramidal if the outer post shell of the central atom has

3 lone pair 1 bond pair

2 band pair 2 lone pair

1 band pair 3 lone pair

3 band pair one lone pair

14. The demand of gasoline can be fulfilled by

Vapourization

Crystallization

Cracking

Reforming

15. Which of the following gases is used for illuminating purpose?

Butane

Methane

Ethane

Propane

16. An alkene forms isomers if the number of carbon atoms is at least

17. No lead gasoline with hygher octane number can be obtained by

Hydrogenation

Oxidation

Cracking

Reforming process

18. Toulene is a compound in which benzene has a substituent

- OH group

-CH₃ group

+NH₂ group

-CHO group

19. A molecular orbital is formed by the linear combination of two atomic orbitals. A molecular orbital must accommodate __________ electrons.

20. Normal by product of cracking is

Ethane

Butane

Benzene

All of these

21. Acetylene has a characteristic ethereal smell resembling that of:

Garlic

Ginger

Onion

Vinegar

22. The rotation of two carbon atoms joined by double bond would happened only if

None of these

Both bonds are broken

Sigma bond is broken

Pi bond is broken

23. Which one has zero octane number?

n – Heptane

n – Hexane

decane

iso – octane

24. There is no direct test for the detection of one of the following is an organic compound. Which is it?

25. Vital force theory was rejected by

Wholer

Berzelius

Lavoisier

Kolbe

Page 2 of 5

26. Metallic ethynides are formed by the reaction of ________ with ammonical solver nitrate or ammonical cuprous chloride

Benzene

Ethanoic acid

Acetylene

Ethane

27. Choose the molecule that is incorrectly matched with the electronic geometry about the central atom.

PF₃ - pyramidal

CF₄ - tetrahedral

NH₃ - tetrahedral

H₂O – tetrahedral

28. The structure of benzene is

Square planer

Tetrahedral

Hexagonal

Pyramidal

29. The open chain organic compounds are called

Aliphatic

Linear compounds

Both A and B

Aromatic

30. Compounds have same empirical formula but different molecular formula must have

The same viscosity

The same vapour density

Different molecular weights

Same molecular weights

31. The self-linking of carbon atoms is called

None of these

Catenation

Chelation

Isomerism

32. Which of the following compounds contains a truple bond?

Alkane

Alkyne

Alkene

Benzene

33. Wholer prepared urea from

NH₄CNO

NH₃

Ammonia

Uric acid

34. Which of the following has linear shape?

SP³

None of these

SP²

35. On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives.

Methyl alcohol

Methyl hydrogen sulphate

Ethyl hydrogen sulphate

Ethyl alcohol

36. Identify the compound which has a bond angle of 109.5°?

Methane

Benzene

Ethyne

Ethere

37. Unsaturated hydrocarbons containing a double bond are called

Alkanes

Paraffin

Acetylene

Olefins

38. Which polyatomic ion is incorrectly matched with its ionic geometry?

ClO₂ - angular

NH₄⁺ - tetrahedral

SiCl₆²¯ -trigonal bipyramidal

PH₄⁺ - tetrahedral

39. The active part in a molecule is called:

Homologous series

Functional group

Chemical bonding

Ionic complex

40. Which of the following contains single bonds?

Alkane

Alkene

Alkyne

Benzene

41. An isomer of ethanol is:

Diethyl ether

Dimethyl ether

Methanol

Acetone

42. Reactions of 2 – Butene with HBr gives only one products because

It is less stable

It is more stable

The molecule is symmetrical around C – C

The molecule is asymmetrical around C – C bond

43. The components of petroleum can be separated due to

Having different physical states

Having different B.P.

Having different M.P.

Having different chemical properties

44. Which of the following possess linear geometry

Alkene

Alkyne

Benzene

Alkane

45. Replacement of hydrogen atom by – SO₃H group in benzene is called

Alkylation

Nitration

Acylation

Sulphonation

46. In C₂H₂ carbon-carbon bond angle is

109.5°

180°

90°

120°

47. Hybridization explain the ________ of orbitals

Type of Bonding

Shape and Type of bonding

Shapes

None of these

48. Which of the following compounds will exhibit cis-trans isomerism?

Butanal

2-butyne

2-butanol

2-butene

49. The components of petroleum can be separated due to

Having different M.P.

Having different physical states

Having different chemical properties

Having different B.P.

50. Hydrocarbons contain

C, H, O and N only

C, H, and O only

C and S only

C and H only

Page 3 of 5

51. The number of isomers of C₆H₁₄ is:

52. Which molecule is nonpolar?

CHCl₃

H₂Se

PF₃

BeH₂

53. Which is a mixture of low boiling hydrocarbon

Natural gas

Petroleum

Wood

Graphite

54. The state of hybridization carbon in ethane is

SP²

None

SP³

55. In which molecule carbon atom is sp² hybridized

CH₄

C₂H₄

None of these

C₂H₂

56. On passing ethane into concentrated sulphuric acid, the intermediate compound formed on hydrolysis with boiling water gives:

Methyl alcohol

Ethyl alcohol

Methyl hydrogen sulphate

Ethyl hydrogen sulphate

57. Alkanes cannot show cis-trans isomerism

The bond angle is 109.5°

0¯ bond required less energy to be rotated

0¯ bond is stronger than A-bond

Alkanes possess three groups attached to each carbon

58. C₂H₂Cl₂ can show isomerism

Metamerism

Geometric

Position

Functional group

59. A π (pi) bond is the result of the

Sidewise overlap of two parallel p orbitals

Overlap of an s and a p orbital

Overlap of two s orbitals

Overlap of two p orbitals along their axes

60. Organic compounds are soluble in all except

Benzene

Water

Ether

Petroleum

61. Which of the following four molecules are polar: PH₃ OF₂ HF SO₃?

None of these

All except SO₃

Only HF and OF₂

Only HF

62. Which of the following pairs of molecules and their molecular geometries in WRONG?

AsF₅ - trigonal bipyramidal

BF₃ - trigonal planar

NF₃ - trigonal planar

H₂O - bent

63. Acetylene had a characteristic ethereal smell resembling that of

Vinegar

Garlic

Onion

Ginger

64. The functional group isomer of dimethyl –ether is

Diethyl pether

Butyl alcohol

Prophyl alcohol

Ethyl alcohol

65. The use of tetra ethyl lead in petrol as an efficient antiknock agent is being discouraged. Which reason is correct?

It damages the engine

The combustion product, lead causes air pollution

It is costly

Pb is difficult to obtain in bulk qualities

66. The process in which one s and two p orbitals mix up with each other is called

Sp³-hybridization

Sp-hybridization

Dsp²-hybridization

Sp²-hybridization

67. Identify the4 compound formed, when ethylene combines with water in the presences of 10% sulphuric acid and HgSO₄ as catalyst

Glycol

Carbinol

Ethanol

Methanol

68. Which molecule has a linear arrangement of all component atoms?

H₂O

NH₃

CO₂

CH₄

69. Polythene is a polymer of

Ethene

Ethane

Acetone

Propylene

70. The major portion of natural oil is

Propane

Butane

Ethane

Methane

71. The F-S-F bond angles in SF₆ are ___________.

90° and 120°

120° only

90° and 180°

45° and 90°

72. The compounds containing –SH as a functional group are called

Alcohols

Sulphides

Hydrogen sulphides

Thiols

73. Identify the hydrocarbon formed, when ethyl bromide reacts with, alcoholic KOH at 100°

Ethane

Ethene

Methane

Ethyne

74. Furan is a give membered ring in which one position is occupied by

H-O-

H-N-

None

-O-

75. Isomerism which is only found in alkanes?

Metamerism

Position isomerism

cis – trans isomerism

Functional group isomerism

Page 4 of 5

76. Which statement is true regarding reactivity?

Double and is stronger than single bond hence alkenes are less reactive than alkanes

Alkenes do not undergo addition reactions

Alkene decolourize bromine solution and Baeyer’s reagents but alkynes do not

Towards the addition reaction alkenes are more reactive than alkynes

77. Coal heated in the absence of air of about 500-1000⁰C is converted to

Coal tar

All above

Coke

Coal gas

78. Ether shows the phenomenon of

Metamerism

Chain isomerism

Cis – trass isomerism

Position isomerism

79. Pi bonds are produced by overlapping of

Hybrid and un hybrid orbitals

Atomic orbital and hybrid orbital

Hybrid orbitals

Un-hybrid orbitals

80. Rates of organic reactions are

Fast

None-reactive

Slow

Very fast

81. Which is the character of organic compounds

Rates of reactions are very fast

They possess particular properties

All

Mostly ionic in character

82. A triple bond contains _____ sigma bond(s) and _________ pi bond(s).

3, 0

2, 1

1, 2

0, 3

83. Which of the following in not an organic compound?

Methane

Ammonium cyanate

Glucose

Urea

84. Coal is obtained from dead remains of

Both a and b

None

Animals

Plants

85. Which one of the following contains 50% carbon?

Wood

Peat

Coal tar

Antheracite

86. The essential component of organic compound is

87. When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

Three sigma and one Pi

One sigma and three Pi

Sigma

Two sigma and two Pi

88. A neutral molecule having the general formula AB₃ has two unshared pair of electrons on A. What is the hybridization of A?

sp³d

sp²

sp³

89. What hybridization is predicted for sulfur in the HSO₃¯ ion?

sp³

sp³d

sp²

90. The next homologue of C₁₀H₂₂ will be

C₉H₂₀

C₁₂H₂₆

C₁₃H₂₈

C₁₁H₂₄

91. In Pakistan, 80% available coal is used for which purpose

Domestic use

Sugar industry

Bake bricks

In glass industry

92. Which of the following species is planar?

NO₃¯

NH₃

H₃O⁺

SO₃²¯

93. Linear shape is shown by which compound

CHCl₃

C₂Cl₂

C₂H₂Cl₂

C₂H₆

94. Methane is produced when aluminum carbide is treated with

Water

Acid

Base

Alcohol

95. Straight chain hydrocarbons are

In which atoms of C are in a series

In which each carbon is attached at least with three other carbon atoms

None of these

Not in a series

96. When a compound X is passed through a dilute alkaline solution of KMnO₄ the pink colour of solution is discharged. The compound X is possibly

Methane

Benzene

Ethene

Ethane

97. The process in which orbitals of different energies and shapes mix up with each other to give equivalent orbitals is called

Isomerisation

Carbonization

Polymerization

Hybridization

98. Either show the phenomenon of

Functional group isomerism

Cis-trans isomerism

Metamerism

Position isomerism

99. The carbocyclic compounds are those which have

All atoms in the ring are carbon

May be other atoms

All atoms are SP³ -hybridized

All atoms are SP² -hybridized

100. The compounds which have any atom other than carbon atom, in rings are called as

Monocyclic

Heterocyclic

None of these

Homocyclic

Page 5 of 5

101. In catalytic cracking, the typical catalyst used is

Al₂O₃

SiO₂+Al₂O₃

SiO₂

102. Organic compounds resemble to those of inorganic compounds having same

Carbon forming long chain or rings

Chemical forces

Isomerism

Ionic properties

103. The perchloric acid molecule contains:

9 lone pairs, no π bonds, and 6 σ bonds.

8 lone pairs, 2 π bonds, and 7 σ bonds.

13 lone pairs, 1 π bond, and 4 σ bonds

2 lone pairs, 3 π bonds, and 4 σ bonds.

104. Fossil fuels are sources of organic compounds. Which one is not fossil fuel?

Coal

Natural gas

Petroleum

Wood

105. I-Chloropropane has two isomers. It is an example of

Metamerism

Chain isomerism

Position isomerism

Functional group isomerism

106. The four bonds of carbon in methane are directed towards the corners of

Cube

Pentagon

Tetrahedron

Hexagon

107. Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called:

Un-saturated

Saturated

Para-magnetic

Magnetic

108. C₄H₈ can show isomerism

Structural

Geometric

Position

Functional group

109. Cracking is a process by which higher hydrocarbon are broken down into low boiling hydrocarbon. Which one is not generally a procedure for cracking:

Thermal cracking

Stem cracking

Catalytic cracking

Normal cracking

110. The isomers which can be inter converted through rotation around a single bond are:

Conformers

Positional isomers

Enantiomers

Diastereomers

111. Which one is not an organic compound

Carbohydrates

None of these

Fats

Cyanides

112. Petroleum is mainly a mixture of

Phenols

Unsaturated hydrocarbon

Compounds of S

Saturated hydrocarbons

113. The bond angle between hydrogen atoms and carbon in alkane is

107.5°

109.5°

104.5°

120.5°

114. Which is the solid form of petroleum?

Peat

Naptha

Asphalt

Wood

115. Which is not the characteristic property of organic compounds?

They form long chain compounds

Organic compounds are water soluble

They exist in homologous series

Organic compound chain compounds

116. Peat before conversion to bituminous coal is converted to

Anthracite

Lignite

Asphalt

None

117. Which one of the following is a heterocyclic compound?

Anthracene

Phenol

Cyclohexanol

Pysidence

118. Ethyl alcohol on ____________ gives ethane

Oxidation

Dehydrogenation

Hydration

Dehydration

119. When H₂SO₄ is heated with excess of chance of at 140°C. The major product is

Alcohol

Ethene

Ether

Ketone

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Malik TahirLast Updated: May 24, 2025

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10 Comments

Misbah Komal says:

March 14, 2023 at 1:10 am

I learnt a good knowledge from it and feel proud

Misbah Komal says:

March 14, 2023 at 1:09 am

I learnt a good knowledge from it

Khadeja says:

February 25, 2023 at 11:05 pm

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Mian rouf Sajjad says:

September 28, 2021 at 5:59 pm

I got 100% marks!!

Mian rouf Sajjad says:

September 28, 2021 at 5:58 pm

I got ?% marks!!

Ariba jaffar says:

June 13, 2021 at 1:36 pm

It’s good to solve these McQ’s but there must be some more conceptual and technical points in them like there a lot of conceptual McQ’s about isomerism..

Haniya Khan says:

September 15, 2017 at 10:47 pm

yes 100%

1. Injeel Khan says:
  
  May 12, 2022 at 10:09 pm
  
  What do you mean 100%
  
2. Naeem Asghar says:
  
  May 26, 2022 at 10:08 am
  
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nimra ishfaq says:

August 21, 2016 at 2:57 pm

yes! 100%

MDCAT Fundamental Principles of Organic Chemistry Test Online

Chemistry Fundamental Principles of Organic Chemistry MCQS Online Test

MDCAT Chemistry Fundamental Principles of Organic Chemistry Chapter Online Test

MDCAT Chemistry Fundamental Principles of Organic Chemistry Test

Chemistry

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Chemistry Fundamental Principles of Organic Chemistry MCQS Online Test

MDCAT Chemistry Fundamental Principles of Organic Chemistry Chapter Online Test

MDCAT Chemistry Fundamental Principles of Organic Chemistry Test

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