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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 solid form of petroleum?

Peat

Wood

Asphalt

Naptha

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

Heterocyclic

Homocyclic

Monocyclic

None of these

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

sp²

sp³

sp³ d

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

H₂O - bent

AsF₅ - trigonal bipyramidal

NF₃ - trigonal planar

BF₃ - trigonal planar

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

Peat

Coal tar

Wood

Antheracite

6. Coal is obtained from dead remains of

Both a and b

None

Animals

Plants

7. The demand of gasoline can be fulfilled by

Reforming

Vapourization

Crystallization

Cracking

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

Same molecular weights

The same viscosity

Different molecular weights

The same vapour density

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

Isomerism

Ionic properties

Chemical forces

Carbon forming long chain or rings

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

CH₄

H₂O

CO₂

NH₃

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

Ethane

Acetylene

Benzene

Ethanoic acid

12. C₂H₂Cl₂ can show isomerism

Metamerism

Functional group

Geometric

Position

13. Linear shape is shown by which compound

C₂Cl₂

C₂H₆

CHCl₃

C₂H₂Cl₂

14. The major portion of natural oil is

Butane

Ethane

Methane

Propane

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

Vinegar

Onion

Ginger

Garlic

16. Which one is not an organic compound

Cyanides

None of these

Carbohydrates

Fats

17. 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

Catalytic cracking

Thermal cracking

18. Which one has zero octane number?

decane

n – Heptane

n – Hexane

iso – octane

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

0, 3

3, 0

2, 1

1, 2

20. Methane is produced when aluminum carbide is treated with

Water

Acid

Base

Alcohol

21. 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

Benzene

Ethene

Methane

Ethane

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

23. Alkanes cannot show cis-trans isomerism

The bond angle is 109.5°

0¯ bond is stronger than A-bond

Alkanes possess three groups attached to each carbon

0¯ bond required less energy to be rotated

24. C₄H₈ can show isomerism

Structural

Position

Geometric

Functional group

25. The self-linking of carbon atoms is called

Catenation

Isomerism

Chelation

None of these

Page 2 of 5

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

Nitration

Sulphonation

Alkylation

Acylation

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

Phenol

Cyclohexanol

Anthracene

Pysidence

28. An isomer of ethanol is:

Methanol

Dimethyl ether

Diethyl ether

Acetone

29. The state of hybridization carbon in ethane is

SP²

None

SP³

30. The components of petroleum can be separated due to

Having different physical states

Having different chemical properties

Having different B.P.

Having different M.P.

31. 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

32. The characteristic reactions of alkanes are

Condensation reactions

Substitution reactions

Addition reactions

Polymerization

33. 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

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

Petroleum

Wood

Natural gas

Coal

35. 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

One sigma and three Pi

Sigma

Three sigma and one Pi

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

All above

Coal tar

Coke

Coal gas

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

45° and 90°

120° only

90° and 120°

90° and 180°

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

PH₄⁺ - tetrahedral

ClO₂ - angular

SiCl₆²¯ -trigonal bipyramidal

NH₄⁺ - tetrahedral

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

Alcohols

Thiols

Sulphides

Hydrogen sulphides

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

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

Cracking

Isomerization

Polymerization

Condensation

42. Which molecule is nonpolar?

BeH₂

CHCl₃

H₂Se

PF₃

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

Pi bond is broken

Both bonds are broken

None of these

Sigma bond is broken

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

2-butyne

2-butene

2-butanol

Butanal

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

ClO₄¯ - tetrahedral

SO₃²¯ - pyramidal

ClO₃¯-tetrahedral

NO₂¯ - trigonal palnar

46. Which of the following contains single bonds?

Alkyne

Alkane

Alkene

Benzene

47. Acetylene had a characteristic ethereal smell resembling that of

Vinegar

Ginger

Garlic

Onion

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

Acylation

Alkylation

Sulphonation

Nitration

49. Which is a mixture of low boiling hydrocarbon

Wood

Natural gas

Petroleum

Graphite

50. Which of the following species is planar?

NO₃¯

SO₃²¯

NH₃

H₃O⁺

Page 3 of 5

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

Ethane

Ethyne

Methane

Ethene

52. Ether shows the phenomenon of

Cis – trass isomerism

Chain isomerism

Position isomerism

Metamerism

53. 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

54. Petroleum is mainly a mixture of

Phenols

Saturated hydrocarbons

Compounds of S

Unsaturated hydrocarbon

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

It is costly

It damages the engine

Pb is difficult to obtain in bulk qualities

The combustion product, lead causes air pollution

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

Only HF and OF₂

None of these

Only HF

All except SO₃

57. Which is the character of organic compounds

Mostly ionic in character

They possess particular properties

Rates of reactions are very fast

All

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

Saturated

Un-saturated

Para-magnetic

Magnetic

59. Which of the following is complex?

C₆H₁₂O₆

(C₆H₁₀O₅)n

CH₄

CaSO₄. 0.5H₂O

60. Straight chain hydrocarbons are

None of these

Not in a series

In which atoms of C are in a series

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

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

Glucose

Ammonium cyanate

Methane

Urea

62. Organic compounds are soluble in all except

Benzene

Water

Ether

Petroleum

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

Tetrahedron

Pentagon

Cube

Hexagon

64. Which statement is true regarding reactivity?

Towards the addition reaction alkenes are more reactive than alkynes

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

Alkenes do not undergo addition reactions

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

65. The number of isomers of C₆H₁₄ is:

66. Wholer prepared urea from

NH₃

NH₄CNO

Ammonia

Uric acid

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

68. The structure of benzene is

Hexagonal

Square planer

Tetrahedral

Pyramidal

69. Unsaturated hydrocarbons containing a double bond are called

Olefins

Paraffin

Alkanes

Acetylene

70. Which of the following possess linear geometry

Alkyne

Benzene

Alkene

Alkane

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

Diastereomers

Positional isomers

Conformers

Enantiomers

72. Ethyl alcohol on ____________ gives ethane

Dehydrogenation

Dehydration

Oxidation

Hydration

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

Methane

Ethere

Ethyne

Benzene

74. The carbocyclic compounds are those which have

May be other atoms

All atoms are SP² -hybridized

All atoms are SP³ -hybridized

All atoms in the ring are carbon

75. Pi bonds are produced by overlapping of

Un-hybrid orbitals

Hybrid orbitals

Hybrid and un hybrid orbitals

Atomic orbital and hybrid orbital

Page 4 of 5

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

Chain isomerism

Functional group isomerism

Metamerism

Position isomerism

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

Sugar industry

Domestic use

In glass industry

Bake bricks

78. Bromoethane can be converted to ethane by

Oxidation

Reaction with aq KOH

Reaction with alcoholic KOH

Reduction

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

Alkyne

Benzene

Alkene

Alkane

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

Ethyl alcohol

Methyl hydrogen sulphate

Ethyl hydrogen sulphate

Methyl alcohol

81. Vital force theory was rejected by

Wholer

Kolbe

Lavoisier

Berzelius

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

H-N-

None

H-O-

-O-

83. Normal by product of cracking is

Ethane

Benzene

Butane

All of these

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

sp³

sp²

sp³d

85. 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

Position isomers

Metamers

Chain isomers

86. The next homologue of C₁₀H₂₂ will be

C₁₁H₂₄

C₁₂H₂₆

C₉H₂₀

C₁₃H₂₈

87. In C₂H₂ carbon-carbon bond angle is

180°

109.5°

90°

120°

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

The molecule is asymmetrical around C – C bond

It is less stable

It is more stable

The molecule is symmetrical around C – C

89. The active part in a molecule is called:

Functional group

Homologous series

Chemical bonding

Ionic complex

90. Peat before conversion to bituminous coal is converted to

Lignite

Anthracite

Asphalt

None

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

Organic compounds are water soluble

Organic compound chain compounds

They form long chain compounds

They exist in homologous series

92. Isomerism which is only found in alkanes?

Position isomerism

Functional group isomerism

cis – trans isomerism

Metamerism

93. The octane number is 100 for

Isooctane

Neo-Pentane

Neo-octane

n-hexane

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

Alcohol

Ketone

Ether

Ethene

95. The essential component of organic compound is

96. Geometry of simple molecule having sp3 hybrid orbital is

Triangular

Square planner

Tetrahedral

Linear

97. On sp3 hybridization

All p-orbitals are involved

Four p-orbitals are involved

One s and 3 p-orbitals are involved

One p-orbital is involved

98. The perchloric acid molecule contains:

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

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

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

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

99. Either show the phenomenon of

Cis-trans isomerism

Metamerism

Position isomerism

Functional group isomerism

100. Polythene is a polymer of

Ethane

Ethene

Propylene

Acetone

Page 5 of 5

101. The open chain organic compounds are called

Aliphatic

Linear compounds

Both A and B

Aromatic

102. In catalytic cracking, the typical catalyst used is

SiO₂

Al₂O₃

SiO₂+Al₂O₃

103. The functional group isomer of dimethyl –ether is

Diethyl pether

Ethyl alcohol

Butyl alcohol

Prophyl alcohol

104. In benzene carbon – carbon bonds are

Of the order 1.5

Double covalent

3 single and 3 double

Single covalent

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

104.5°

107.5°

120.5°

109.5°

106. Rates of organic reactions are

Slow

None-reactive

Fast

Very fast

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

Methanol

Carbinol

Ethanol

Glycol

108. Which of the following has linear shape?

SP³

None of these

SP²

109. The components of petroleum can be separated due to

Having different chemical properties

Having different M.P.

Having different B.P.

Having different physical states

110. Hydrocarbons contain

C, H, O and N only

C, H, and O only

C and H only

C and S only

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

Ethane

Methane

Propane

Butane

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

H₂O – tetrahedral

NH₃ - tetrahedral

CF₄ - tetrahedral

PF₃ - pyramidal

113. In which molecule carbon atom is sp² hybridized

CH₄

None of these

C₂H₂

C₂H₄

114. Hybridization explain the ________ of orbitals

Type of Bonding

None of these

Shapes

Shape and Type of bonding

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

sp³d

sp³

sp²

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

Carbonization

Polymerization

Isomerisation

Hybridization

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

Oxidation

Cracking

Hydrogenation

Reforming process

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

Overlap of two p orbitals along their axes

Sidewise overlap of two parallel p orbitals

Overlap of two s orbitals

Overlap of an s and a p orbital

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

- OH group

-CHO group

+NH₂ group

-CH₃ group

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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

[email protected]

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
  
  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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