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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. Which is the character of organic compounds

They possess particular properties

All

Mostly ionic in character

Rates of reactions are very fast

2. Wholer prepared urea from

NH₃

NH₄CNO

Ammonia

Uric acid

3. The carbocyclic compounds are those which have

All atoms are SP³ -hybridized

All atoms are SP² -hybridized

May be other atoms

All atoms in the ring are carbon

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

Functional group isomerism

Chain isomerism

Metamerism

Position isomerism

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

Carbonization

Hybridization

Isomerisation

Polymerization

6. 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

7. In benzene carbon – carbon bonds are

Single covalent

Double covalent

3 single and 3 double

Of the order 1.5

8. The functional group isomer of dimethyl –ether is

Diethyl pether

Butyl alcohol

Prophyl alcohol

Ethyl alcohol

9. Which statement is true regarding reactivity?

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

Towards the addition reaction alkenes are more reactive than alkynes

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

Alkenes do not undergo addition reactions

10. An isomer of ethanol is:

Acetone

Dimethyl ether

Methanol

Diethyl ether

11. The components of petroleum can be separated due to

Having different M.P.

Having different B.P.

Having different chemical properties

Having different physical states

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

Cracking

Hydrogenation

Oxidation

Reforming process

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

Ether

Ethene

Ketone

Alcohol

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

Ethyne

Ethere

Methane

Benzene

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

90° and 120°

45° and 90°

90° and 180°

120° only

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

Nitration

Alkylation

Sulphonation

Acylation

17. On sp3 hybridization

All p-orbitals are involved

Four p-orbitals are involved

One p-orbital is involved

One s and 3 p-orbitals are involved

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

-CHO group

- OH group

+NH₂ group

-CH₃ group

19. Which of the following species is planar?

SO₃²¯

NH₃

H₃O⁺

NO₃¯

20. The structure of benzene is

Hexagonal

Tetrahedral

Pyramidal

Square planer

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

Pi bond is broken

Sigma bond is broken

Both bonds are broken

None of these

22. Geometry of simple molecule having sp3 hybrid orbital is

Linear

Triangular

Tetrahedral

Square planner

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

Cyclohexanol

Pysidence

Phenol

Anthracene

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

H₂O – tetrahedral

PF₃ - pyramidal

CF₄ - tetrahedral

NH₃ - tetrahedral

25. Which one has zero octane number?

n – Heptane

iso – octane

decane

n – Hexane

Page 2 of 5

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

sp²

sp³ d

sp³

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

2-butyne

2-butene

2-butanol

Butanal

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

Ethanol

Methanol

Glycol

Carbinol

29. The active part in a molecule is called:

Homologous series

Ionic complex

Chemical bonding

Functional group

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

Ethyne

Ethane

Ethene

Methane

31. Peat before conversion to bituminous coal is converted to

Asphalt

Anthracite

None

Lignite

32. Petroleum is mainly a mixture of

Saturated hydrocarbons

Unsaturated hydrocarbon

Compounds of S

Phenols

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

Different molecular weights

The same viscosity

The same vapour density

Same molecular weights

34. Ethyl alcohol on ____________ gives ethane

Oxidation

Dehydration

Dehydrogenation

Hydration

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

ClO₃¯-tetrahedral

ClO₄¯ - tetrahedral

SO₃²¯ - pyramidal

NO₂¯ - trigonal palnar

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

It damages the engine

Pb is difficult to obtain in bulk qualities

The combustion product, lead causes air pollution

It is costly

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

Natural gas

Wood

Petroleum

Coal

38. The essential component of organic compound is

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

Methane

Propane

Ethane

Butane

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

Alkane

Benzene

Alkene

Alkyne

41. The major portion of natural oil is

Butane

Ethane

Propane

Methane

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

3, 0

2, 1

1, 2

0, 3

43. 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

One sigma and three Pi

Two sigma and two Pi

Sigma

Three sigma and one Pi

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

Thiols

Sulphides

Alcohols

Hydrogen sulphides

45. Isomerism which is only found in alkanes?

cis – trans isomerism

Metamerism

Functional group isomerism

Position isomerism

46. Unsaturated hydrocarbons containing a double bond are called

Alkanes

Paraffin

Olefins

Acetylene

47. C₄H₈ can show isomerism

Position

Geometric

Functional group

Structural

48. Which of the following contains single bonds?

Alkane

Alkyne

Benzene

Alkene

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

NH₃

CH₄

CO₂

H₂O

50. Normal by product of cracking is

Butane

Benzene

All of these

Ethane

Page 3 of 5

51. Polythene is a polymer of

Ethene

Propylene

Acetone

Ethane

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

Methane

Ammonium cyanate

Urea

Glucose

53. The next homologue of C₁₀H₂₂ will be

C₁₂H₂₆

C₉H₂₀

C₁₁H₂₄

C₁₃H₂₈

54. The number of isomers of C₆H₁₄ is:

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

NH₄⁺ - tetrahedral

PH₄⁺ - tetrahedral

SiCl₆²¯ -trigonal bipyramidal

ClO₂ - angular

56. In C₂H₂ carbon-carbon bond angle is

120°

90°

109.5°

180°

57. In catalytic cracking, the typical catalyst used is

Al₂O₃

SiO₂+Al₂O₃

SiO₂

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

Tetrahedron

Pentagon

Hexagon

Cube

59. Coal is obtained from dead remains of

None

Animals

Both a and b

Plants

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

Carbon forming long chain or rings

Isomerism

Ionic properties

Chemical forces

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

H-N-

H-O-

-O-

None

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

3 band pair one lone pair

1 band pair 3 lone pair

2 band pair 2 lone pair

3 lone pair 1 bond pair

63. Which of the following has linear shape?

SP²

SP³

None of these

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

Peat

Coal tar

Antheracite

Wood

65. Which is the solid form of petroleum?

Wood

Peat

Asphalt

Naptha

66. In which molecule carbon atom is sp² hybridized

CH₄

C₂H₄

None of these

C₂H₂

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

sp²

sp³d

sp³

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

69. Pi bonds are produced by overlapping of

Un-hybrid orbitals

Atomic orbital and hybrid orbital

Hybrid orbitals

Hybrid and un hybrid orbitals

70. Linear shape is shown by which compound

CHCl₃

C₂Cl₂

C₂H₂Cl₂

C₂H₆

71. The open chain organic compounds are called

Both A and B

Aliphatic

Aromatic

Linear compounds

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

Ginger

Onion

Vinegar

Garlic

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

Overlap of two s orbitals

Sidewise overlap of two parallel p orbitals

Overlap of two p orbitals along their axes

Overlap of an s and a p orbital

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

Bake bricks

Sugar industry

Domestic use

In glass industry

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

sp²

sp³d

sp³

Page 4 of 5

76. Alkanes cannot show cis-trans isomerism

0¯ bond is stronger than A-bond

Alkanes possess three groups attached to each carbon

0¯ bond required less energy to be rotated

The bond angle is 109.5°

77. Either show the phenomenon of

Cis-trans isomerism

Functional group isomerism

Position isomerism

Metamerism

78. Straight chain hydrocarbons are

None of these

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

In which atoms of C are in a series

Not in a series

79. The self-linking of carbon atoms is called

Isomerism

None of these

Chelation

Catenation

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

Stem cracking

Thermal cracking

Catalytic cracking

Normal cracking

81. Which one is not an organic compound

Cyanides

Fats

Carbohydrates

None of these

82. 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

83. The characteristic reactions of alkanes are

Condensation reactions

Polymerization

Addition reactions

Substitution reactions

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

Positional isomers

Conformers

Diastereomers

Enantiomers

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

All above

Coal gas

Coke

Coal tar

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

120.5°

104.5°

109.5°

107.5°

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

Sp²-hybridization

Sp-hybridization

Dsp²-hybridization

Sp³-hybridization

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

Acetylene

Benzene

Ethanoic acid

Ethane

89. 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

90. Which is a mixture of low boiling hydrocarbon

Wood

Graphite

Natural gas

Petroleum

91. 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

Functional isomers

Chain isomers

Position isomers

92. Rates of organic reactions are

Fast

Slow

Very fast

None-reactive

93. Organic compounds are soluble in all except

Petroleum

Ether

Benzene

Water

94. Which of the following possess linear geometry

Benzene

Alkyne

Alkene

Alkane

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

96. C₂H₂Cl₂ can show isomerism

Position

Metamerism

Geometric

Functional group

97. Methane is produced when aluminum carbide is treated with

Base

Alcohol

Water

Acid

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

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

Monocyclic

None of these

Heterocyclic

Homocyclic

100. 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.

Page 5 of 5

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

H₂O - bent

NF₃ - trigonal planar

BF₃ - trigonal planar

AsF₅ - trigonal bipyramidal

102. Which of the following is complex?

C₆H₁₂O₆

CH₄

CaSO₄. 0.5H₂O

(C₆H₁₀O₅)n

103. 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

Ethane

Ethene

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

Polymerization

Cracking

Condensation

Isomerization

105. Hydrocarbons contain

C and S only

C, H, O and N only

C and H only

C, H, and O only

106. The octane number is 100 for

Isooctane

n-hexane

Neo-Pentane

Neo-octane

107. The demand of gasoline can be fulfilled by

Vapourization

Cracking

Reforming

Crystallization

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

Alkylation

Acylation

Sulphonation

Nitration

109. Hybridization explain the ________ of orbitals

None of these

Shape and Type of bonding

Shapes

Type of Bonding

110. Vital force theory was rejected by

Kolbe

Wholer

Berzelius

Lavoisier

111. The components of petroleum can be separated due to

Having different B.P.

Having different M.P.

Having different chemical properties

Having different physical states

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

Only HF and OF₂

All except SO₃

None of these

Only HF

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

Para-magnetic

Magnetic

Saturated

Un-saturated

114. Acetylene had a characteristic ethereal smell resembling that of

Vinegar

Onion

Ginger

Garlic

115. Bromoethane can be converted to ethane by

Reaction with alcoholic KOH

Reaction with aq KOH

Oxidation

Reduction

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

Methyl hydrogen sulphate

Ethyl alcohol

Ethyl hydrogen sulphate

Methyl alcohol

117. Which molecule is nonpolar?

CHCl₃

PF₃

H₂Se

BeH₂

118. The state of hybridization carbon in ethane is

SP²

None

SP³

119. Ether shows the phenomenon of

Cis – trass isomerism

Metamerism

Chain isomerism

Position isomerism

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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

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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
  
  100% ho hi nahi skta even ap k saary bhi theek hn mien ny 2 baar kia hai mery 100% theek thy but is website k alogarithms hi khuch aisy hien k ap ka aik koi lazmi ghlt krien gy.
  
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

Chemistry

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