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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 Pakistan, 80% available coal is used for which purpose

Sugar industry

Domestic use

In glass industry

Bake bricks

2. Which one is not an organic compound

Carbohydrates

None of these

Fats

Cyanides

3. 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

Functional isomers

Metamers

Chain isomers

Position isomers

4. Which of the following contains single bonds?

Alkyne

Alkene

Alkane

Benzene

5. The self-linking of carbon atoms is called

Isomerism

None of these

Catenation

Chelation

6. The state of hybridization carbon in ethane is

None

SP³

SP²

7. Acetylene had a characteristic ethereal smell resembling that of

Onion

Garlic

Ginger

Vinegar

8. Polythene is a polymer of

Acetone

Ethene

Propylene

Ethane

9. In which molecule carbon atom is sp² hybridized

C₂H₄

C₂H₂

CH₄

None of these

10. Which one has zero octane number?

iso – octane

n – Hexane

decane

n – Heptane

11. C₂H₂Cl₂ can show isomerism

Metamerism

Functional group

Position

Geometric

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

104.5°

107.5°

109.5°

120.5°

13. 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

Two sigma and two Pi

Sigma

Three sigma and one Pi

One sigma and three Pi

14. Which of the following has linear shape?

SP³

None of these

SP²

15. Rates of organic reactions are

Fast

Very fast

None-reactive

Slow

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

Benzene

Ethanoic acid

Acetylene

Ethane

17. Which of the following possess linear geometry

Alkyne

Benzene

Alkane

Alkene

18. The active part in a molecule is called:

Functional group

Ionic complex

Chemical bonding

Homologous series

19. Which is a mixture of low boiling hydrocarbon

Wood

Graphite

Petroleum

Natural gas

20. On sp3 hybridization

One s and 3 p-orbitals are involved

Four p-orbitals are involved

One p-orbital is involved

All p-orbitals are involved

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

Enantiomers

Conformers

Positional isomers

Diastereomers

22. The perchloric acid molecule contains:

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.

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

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

H₂O

NH₃

CO₂

CH₄

24. Which molecule is nonpolar?

CHCl₃

PF₃

BeH₂

H₂Se

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

Anthracene

Pysidence

Phenol

Cyclohexanol

Page 2 of 5

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

Propane

Methane

Butane

Ethane

27. Pi bonds are produced by overlapping of

Atomic orbital and hybrid orbital

Un-hybrid orbitals

Hybrid and un hybrid orbitals

Hybrid orbitals

28. Ether shows the phenomenon of

Position isomerism

Cis – trass isomerism

Metamerism

Chain isomerism

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

PH₄⁺ - tetrahedral

SiCl₆²¯ -trigonal bipyramidal

NH₄⁺ - tetrahedral

ClO₂ - angular

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

Cube

Pentagon

Tetrahedron

Hexagon

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

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

Glucose

Ammonium cyanate

Methane

Urea

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

Overlap of an s and a p orbital

Sidewise overlap of two parallel p orbitals

Overlap of two s orbitals

Overlap of two p orbitals along their axes

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

Sigma bond is broken

None of these

Both bonds are broken

Pi bond is broken

35. Bromoethane can be converted to ethane by

Reaction with aq KOH

Reaction with alcoholic KOH

Reduction

Oxidation

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

Polymerization

Hybridization

Isomerisation

Carbonization

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

None

H-N-

-O-

H-O-

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

Benzene

Alkene

Alkyne

Alkane

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

Only HF

None of these

Only HF and OF₂

All except SO₃

40. Ethyl alcohol on ____________ gives ethane

Oxidation

Dehydrogenation

Hydration

Dehydration

41. The structure of benzene is

Square planer

Hexagonal

Pyramidal

Tetrahedral

42. Which is the solid form of petroleum?

Naptha

Peat

Asphalt

Wood

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

Acylation

Alkylation

Nitration

Sulphonation

44. Petroleum is mainly a mixture of

Saturated hydrocarbons

Phenols

Compounds of S

Unsaturated hydrocarbon

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

NH₃ - tetrahedral

CF₄ - tetrahedral

H₂O – tetrahedral

PF₃ - pyramidal

46. Hydrocarbons contain

C and H only

C and S only

C, H, O and N only

C, H, and O only

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

Ethene

Ether

Alcohol

Ketone

48. Either show the phenomenon of

Cis-trans isomerism

Functional group isomerism

Metamerism

Position isomerism

49. Organic compounds are soluble in all except

Ether

Water

Petroleum

Benzene

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

2-butyne

2-butanol

Butanal

2-butene

Page 3 of 5

51. Linear shape is shown by which compound

CHCl₃

C₂Cl₂

C₂H₆

C₂H₂Cl₂

52. Methane is produced when aluminum carbide is treated with

Water

Acid

Base

Alcohol

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

Peat

Antheracite

Coal tar

Wood

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

All above

Coal gas

Coke

Coal tar

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

Petroleum

Natural gas

Coal

Wood

56. The functional group isomer of dimethyl –ether is

Ethyl alcohol

Butyl alcohol

Prophyl alcohol

Diethyl pether

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

Para-magnetic

Magnetic

Saturated

Un-saturated

58. The major portion of natural oil is

Propane

Butane

Methane

Ethane

59. Which is the character of organic compounds

Rates of reactions are very fast

All

They possess particular properties

Mostly ionic in character

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

Methane

Ethere

Benzene

Ethyne

61. Straight chain hydrocarbons are

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

None of these

Not in a series

In which atoms of C are in a series

62. The octane number is 100 for

Neo-Pentane

Isooctane

n-hexane

Neo-octane

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

SO₃²¯ - pyramidal

ClO₄¯ - tetrahedral

ClO₃¯-tetrahedral

NO₂¯ - trigonal palnar

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

Catalytic cracking

Stem cracking

Normal cracking

Thermal cracking

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

AsF₅ - trigonal bipyramidal

NF₃ - trigonal planar

BF₃ - trigonal planar

H₂O - bent

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

It damages the engine

It is costly

Pb is difficult to obtain in bulk qualities

The combustion product, lead causes air pollution

67. The open chain organic compounds are called

Both A and B

Aromatic

Aliphatic

Linear compounds

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

-CHO group

- OH group

+NH₂ group

-CH₃ group

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

Methyl alcohol

Ethyl alcohol

Ethyl hydrogen sulphate

Methyl hydrogen sulphate

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

sp³

sp³d

sp²

71. Alkanes cannot show cis-trans isomerism

The bond angle is 109.5°

0¯ bond required less energy to be rotated

Alkanes possess three groups attached to each carbon

0¯ bond is stronger than A-bond

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

Hydrogen sulphides

Thiols

Sulphides

Alcohols

73. Isomerism which is only found in alkanes?

Functional group isomerism

cis – trans isomerism

Metamerism

Position isomerism

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

Chemical forces

Ionic properties

Isomerism

Carbon forming long chain or rings

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

The molecule is symmetrical around C – C

It is more stable

It is less stable

The molecule is asymmetrical around C – C bond

Page 4 of 5

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

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

Hydrogenation

Oxidation

Cracking

Reforming process

78. Which of the following species is planar?

SO₃²¯

NO₃¯

H₃O⁺

NH₃

79. The number of isomers of C₆H₁₄ is:

80. 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

Ethane

Ethene

Benzene

Methane

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

sp²

sp³

sp³ d

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

Garlic

Ginger

Onion

Vinegar

83. Wholer prepared urea from

NH₄CNO

Ammonia

NH₃

Uric acid

84. The components of petroleum can be separated due to

Having different M.P.

Having different chemical properties

Having different physical states

Having different B.P.

85. Which statement is true regarding reactivity?

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

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

Alkenes do not undergo addition reactions

Towards the addition reaction alkenes are more reactive than alkynes

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

Nitration

Acylation

Sulphonation

Alkylation

87. An isomer of ethanol is:

Methanol

Acetone

Dimethyl ether

Diethyl ether

88. Peat before conversion to bituminous coal is converted to

Anthracite

None

Lignite

Asphalt

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

Ethyl alcohol

Methyl alcohol

Methyl hydrogen sulphate

Ethyl hydrogen sulphate

90. The essential component of organic compound is

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

2 band pair 2 lone pair

3 lone pair 1 bond pair

3 band pair one lone pair

1 band pair 3 lone pair

92. Hybridization explain the ________ of orbitals

Shapes

None of these

Type of Bonding

Shape and Type of bonding

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

Sp-hybridization

Dsp²-hybridization

Sp²-hybridization

Sp³-hybridization

94. The demand of gasoline can be fulfilled by

Vapourization

Cracking

Reforming

Crystallization

95. Coal is obtained from dead remains of

Plants

Both a and b

Animals

None

96. Which of the following is complex?

CH₄

CaSO₄. 0.5H₂O

C₆H₁₂O₆

(C₆H₁₀O₅)n

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

2, 1

3, 0

1, 2

0, 3

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

sp²

sp³d

sp³

99. In C₂H₂ carbon-carbon bond angle is

109.5°

180°

120°

90°

100. Geometry of simple molecule having sp3 hybrid orbital is

Tetrahedral

Linear

Triangular

Square planner

Page 5 of 5

101. Unsaturated hydrocarbons containing a double bond are called

Olefins

Alkanes

Acetylene

Paraffin

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

None of these

Heterocyclic

Monocyclic

Homocyclic

103. In benzene carbon – carbon bonds are

Of the order 1.5

Double covalent

Single covalent

3 single and 3 double

104. In catalytic cracking, the typical catalyst used is

Al₂O₃

SiO₂

SiO₂+Al₂O₃

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

Cracking

Condensation

Polymerization

Isomerization

106. The carbocyclic compounds are those which have

All atoms in the ring are carbon

May be other atoms

All atoms are SP² -hybridized

All atoms are SP³ -hybridized

107. C₄H₈ can show isomerism

Functional group

Geometric

Position

Structural

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

Organic compounds are water soluble

They exist in homologous series

They form long chain compounds

Organic compound chain compounds

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

Ethanol

Methanol

Carbinol

Glycol

110. The next homologue of C₁₀H₂₂ will be

C₁₁H₂₄

C₁₃H₂₈

C₁₂H₂₆

C₉H₂₀

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

90° and 180°

120° only

45° and 90°

90° and 120°

112. The components of petroleum can be separated due to

Having different physical states

Having different M.P.

Having different chemical properties

Having different B.P.

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

Chain isomerism

Functional group isomerism

Position isomerism

Metamerism

114. The characteristic reactions of alkanes are

Condensation reactions

Substitution reactions

Polymerization

Addition reactions

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

Different molecular weights

Same molecular weights

The same vapour density

The same viscosity

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

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

Methane

Ethyne

Ethene

Ethane

118. Normal by product of cracking is

Butane

Ethane

Benzene

All of these

119. Vital force theory was rejected by

Lavoisier

Berzelius

Wholer

Kolbe

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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

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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

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Mian rouf Sajjad says:

September 28, 2021 at 5:58 pm

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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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