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

Both bonds are broken

Sigma bond is broken

None of these

Pi bond is broken

2. The essential component of organic compound is

3. C₂H₂Cl₂ can show isomerism

Position

Functional group

Geometric

Metamerism

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

Alcohol

Ethene

Ketone

Ether

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

6. On sp3 hybridization

One s and 3 p-orbitals are involved

One p-orbital is involved

All p-orbitals are involved

Four p-orbitals are involved

7. Which of the following contains single bonds?

Alkene

Benzene

Alkane

Alkyne

8. In which molecule carbon atom is sp² hybridized

C₂H₂

None of these

CH₄

C₂H₄

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

Methanol

Glycol

Carbinol

Ethanol

10. Which is a mixture of low boiling hydrocarbon

Graphite

Petroleum

Natural gas

Wood

11. Which is the character of organic compounds

All

Mostly ionic in character

They possess particular properties

Rates of reactions are very fast

12. The self-linking of carbon atoms is called

None of these

Catenation

Isomerism

Chelation

13. The next homologue of C₁₀H₂₂ will be

C₉H₂₀

C₁₁H₂₄

C₁₃H₂₈

C₁₂H₂₆

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

H₂O - bent

NF₃ - trigonal planar

BF₃ - trigonal planar

AsF₅ - trigonal bipyramidal

15. Which of the following species is planar?

H₃O⁺

NO₃¯

NH₃

SO₃²¯

16. Linear shape is shown by which compound

CHCl₃

C₂H₂Cl₂

C₂H₆

C₂Cl₂

17. The structure of benzene is

Tetrahedral

Pyramidal

Hexagonal

Square planer

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

Ethyne

Methane

Ethane

Ethene

19. The carbocyclic compounds are those which have

May be other atoms

All atoms are SP³ -hybridized

All atoms in the ring are carbon

All atoms are SP² -hybridized

20. In benzene carbon – carbon bonds are

Of the order 1.5

Double covalent

Single covalent

3 single and 3 double

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

Coke

Coal gas

Coal tar

All above

22. Which one has zero octane number?

n – Heptane

n – Hexane

decane

iso – octane

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

All except SO₃

Only HF

Only HF and OF₂

None of these

24. 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

Position isomers

Chain isomers

Metamers

Functional isomers

25. Which one is not an organic compound

None of these

Cyanides

Fats

Carbohydrates

Page 2 of 5

26. Which molecule is nonpolar?

PF₃

BeH₂

CHCl₃

H₂Se

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

ClO₃¯-tetrahedral

NO₂¯ - trigonal palnar

ClO₄¯ - tetrahedral

SO₃²¯ - pyramidal

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

sp³

sp³d

sp²

29. Ether shows the phenomenon of

Metamerism

Cis – trass isomerism

Chain isomerism

Position isomerism

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

They form long chain compounds

Organic compound chain compounds

They exist in homologous series

Organic compounds are water soluble

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

Carbon forming long chain or rings

Chemical forces

Ionic properties

Isomerism

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

Butane

Methane

Propane

Ethane

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

Benzene

Ethane

Acetylene

Ethanoic acid

34. 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

35. Geometry of simple molecule having sp3 hybrid orbital is

Tetrahedral

Linear

Square planner

Triangular

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

3 lone pair 1 bond pair

3 band pair one lone pair

1 band pair 3 lone pair

2 band pair 2 lone pair

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

Dsp²-hybridization

Sp²-hybridization

Sp-hybridization

Sp³-hybridization

38. Petroleum is mainly a mixture of

Phenols

Unsaturated hydrocarbon

Compounds of S

Saturated hydrocarbons

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

Nitration

Acylation

Alkylation

Sulphonation

40. Acetylene had a characteristic ethereal smell resembling that of

Garlic

Vinegar

Ginger

Onion

41. The components of petroleum can be separated due to

Having different M.P.

Having different B.P.

Having different physical states

Having different chemical properties

42. 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

Ethene

Methane

Benzene

Ethane

43. Which is the solid form of petroleum?

Asphalt

Peat

Naptha

Wood

44. Alkanes cannot show cis-trans isomerism

Alkanes possess three groups attached to each carbon

The bond angle is 109.5°

0¯ bond required less energy to be rotated

0¯ bond is stronger than A-bond

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

Conformers

Diastereomers

Positional isomers

Enantiomers

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

Same molecular weights

The same vapour density

The same viscosity

Different molecular weights

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

Hexagon

Pentagon

Tetrahedron

Cube

48. Vital force theory was rejected by

Berzelius

Kolbe

Wholer

Lavoisier

49. The open chain organic compounds are called

Aromatic

Aliphatic

Both A and B

Linear compounds

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

Cracking

Oxidation

Hydrogenation

Reforming process

Page 3 of 5

51. Which of the following has linear shape?

None of these

SP³

SP²

52. Peat before conversion to bituminous coal is converted to

Asphalt

Lignite

Anthracite

None

53. Which of the following is complex?

CaSO₄. 0.5H₂O

C₆H₁₂O₆

CH₄

(C₆H₁₀O₅)n

54. The active part in a molecule is called:

Ionic complex

Chemical bonding

Homologous series

Functional group

55. Which of the following possess linear geometry

Alkene

Alkyne

Benzene

Alkane

56. An isomer of ethanol is:

Acetone

Methanol

Diethyl ether

Dimethyl ether

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

90° and 120°

45° and 90°

90° and 180°

120° only

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

Hybridization

Polymerization

Isomerisation

Carbonization

59. The major portion of natural oil is

Butane

Ethane

Propane

Methane

60. Polythene is a polymer of

Propylene

Acetone

Ethene

Ethane

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

Coal

Wood

Petroleum

Natural gas

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

2-butyne

Butanal

2-butanol

2-butene

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

Methane

Glucose

Urea

Ammonium cyanate

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

Benzene

Ethyne

Methane

Ethere

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

Homocyclic

Monocyclic

Heterocyclic

None of these

66. In C₂H₂ carbon-carbon bond angle is

109.5°

120°

90°

180°

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

68. The demand of gasoline can be fulfilled by

Reforming

Cracking

Vapourization

Crystallization

69. Straight chain hydrocarbons are

None of these

Not in a series

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

In which atoms of C are in a series

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

Pb is difficult to obtain in bulk qualities

The combustion product, lead causes air pollution

It damages the engine

It is costly

71. Organic compounds are soluble in all except

Water

Ether

Benzene

Petroleum

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

Normal cracking

Stem cracking

Thermal cracking

Catalytic cracking

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

PF₃ - pyramidal

NH₃ - tetrahedral

H₂O – tetrahedral

CF₄ - tetrahedral

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

SiCl₆²¯ -trigonal bipyramidal

PH₄⁺ - tetrahedral

ClO₂ - angular

NH₄⁺ - tetrahedral

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

Ginger

Garlic

Onion

Vinegar

Page 4 of 5

76. Wholer prepared urea from

Ammonia

Uric acid

NH₃

NH₄CNO

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

H-N-

-O-

H-O-

None

78. Coal is obtained from dead remains of

None

Animals

Both a and b

Plants

79. Isomerism which is only found in alkanes?

cis – trans isomerism

Functional group isomerism

Metamerism

Position isomerism

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

Sulphides

Alcohols

Thiols

Hydrogen sulphides

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

Functional group isomerism

Chain isomerism

Metamerism

Position isomerism

82. 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

Two sigma and two Pi

One sigma and three Pi

Sigma

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

Overlap of two s orbitals

Sidewise overlap of two parallel p orbitals

Overlap of an s and a p orbital

Overlap of two p orbitals along their axes

84. The functional group isomer of dimethyl –ether is

Ethyl alcohol

Diethyl pether

Prophyl alcohol

Butyl alcohol

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

Sulphonation

Nitration

Acylation

Alkylation

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

sp³ d

sp²

sp³

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

88. Ethyl alcohol on ____________ gives ethane

Dehydration

Dehydrogenation

Hydration

Oxidation

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

Saturated

Para-magnetic

Magnetic

Un-saturated

90. The number of isomers of C₆H₁₄ is:

91. Normal by product of cracking is

Benzene

Ethane

Butane

All of these

92. Rates of organic reactions are

Fast

None-reactive

Very fast

Slow

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

Methyl hydrogen sulphate

Ethyl hydrogen sulphate

Ethyl alcohol

Methyl alcohol

94. The state of hybridization carbon in ethane is

SP³

None

SP²

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

Sugar industry

In glass industry

Bake bricks

Domestic use

96. The components of petroleum can be separated due to

Having different B.P.

Having different physical states

Having different chemical properties

Having different M.P.

97. The octane number is 100 for

n-hexane

Isooctane

Neo-octane

Neo-Pentane

98. Pi bonds are produced by overlapping of

Un-hybrid orbitals

Atomic orbital and hybrid orbital

Hybrid orbitals

Hybrid and un hybrid orbitals

99. Methane is produced when aluminum carbide is treated with

Base

Water

Alcohol

Acid

100. Bromoethane can be converted to ethane by

Reaction with aq KOH

Oxidation

Reduction

Reaction with alcoholic KOH

Page 5 of 5

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

Peat

Wood

Antheracite

Coal tar

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

Condensation

Isomerization

Polymerization

Cracking

103. 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

104. Hybridization explain the ________ of orbitals

Type of Bonding

Shapes

Shape and Type of bonding

None of these

105. Which statement is true regarding reactivity?

Alkenes do not undergo addition reactions

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

Towards the addition reaction alkenes are more reactive than alkynes

106. The perchloric acid molecule contains:

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

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

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

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

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

109.5°

107.5°

104.5°

120.5°

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

The molecule is asymmetrical around C – C bond

It is less stable

The molecule is symmetrical around C – C

It is more stable

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

Phenol

Pysidence

Cyclohexanol

Anthracene

110. Either show the phenomenon of

Position isomerism

Metamerism

Functional group isomerism

Cis-trans isomerism

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

Alkane

Benzene

Alkyne

Alkene

112. In catalytic cracking, the typical catalyst used is

SiO₂+Al₂O₃

Al₂O₃

SiO₂

113. The characteristic reactions of alkanes are

Addition reactions

Polymerization

Substitution reactions

Condensation reactions

114. Unsaturated hydrocarbons containing a double bond are called

Olefins

Paraffin

Acetylene

Alkanes

115. Hydrocarbons contain

C and S only

C, H, and O only

C, H, O and N only

C and H only

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

- OH group

-CHO group

+NH₂ group

-CH₃ group

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

NH₃

CH₄

CO₂

H₂O

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

0, 3

3, 0

1, 2

2, 1

119. C₄H₈ can show isomerism

Position

Geometric

Functional group

Structural

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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

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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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