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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. Either show the phenomenon of

Metamerism

Position isomerism

Functional group isomerism

Cis-trans isomerism

2. The self-linking of carbon atoms is called

Isomerism

Chelation

None of these

Catenation

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

-CH₃ group

- OH group

-CHO group

+NH₂ group

4. The active part in a molecule is called:

Homologous series

Chemical bonding

Ionic complex

Functional group

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

120.5°

109.5°

104.5°

107.5°

6. Petroleum is mainly a mixture of

Saturated hydrocarbons

Unsaturated hydrocarbon

Phenols

Compounds of S

7. The essential component of organic compound is

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

Peat

Wood

Antheracite

Coal tar

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

Saturated

Para-magnetic

Un-saturated

Magnetic

10. Which statement is true regarding reactivity?

Towards the addition reaction alkenes are more reactive than alkynes

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

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

Alkenes do not undergo addition reactions

11. Coal is obtained from dead remains of

None

Both a and b

Plants

Animals

12. 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

Ethene

Ethane

Benzene

13. The octane number is 100 for

Neo-octane

Neo-Pentane

Isooctane

n-hexane

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

Alkene

Alkane

Alkyne

Benzene

15. Pi bonds are produced by overlapping of

Un-hybrid orbitals

Atomic orbital and hybrid orbital

Hybrid orbitals

Hybrid and un hybrid orbitals

16. An isomer of ethanol is:

Diethyl ether

Methanol

Dimethyl ether

Acetone

17. Linear shape is shown by which compound

CHCl₃

C₂H₂Cl₂

C₂H₆

C₂Cl₂

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

Petroleum

Natural gas

Wood

Coal

19. In which molecule carbon atom is sp² hybridized

C₂H₂

None of these

C₂H₄

CH₄

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

Ionic properties

Carbon forming long chain or rings

Chemical forces

Isomerism

21. Which molecule is nonpolar?

BeH₂

PF₃

CHCl₃

H₂Se

22. The structure of benzene is

Hexagonal

Pyramidal

Tetrahedral

Square planer

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

3, 0

1, 2

2, 1

0, 3

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

Ethyl hydrogen sulphate

Methyl alcohol

Methyl hydrogen sulphate

Ethyl alcohol

25. Rates of organic reactions are

Fast

None-reactive

Very fast

Slow

Page 2 of 5

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

Methane

Ethyne

Ethane

Ethene

27. The demand of gasoline can be fulfilled by

Reforming

Crystallization

Vapourization

Cracking

28. 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

29. In C₂H₂ carbon-carbon bond angle is

90°

109.5°

120°

180°

30. The number of isomers of C₆H₁₄ is:

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

2-butanol

2-butyne

Butanal

2-butene

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

Bake bricks

In glass industry

Sugar industry

Domestic use

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

Alkylation

Acylation

Nitration

Sulphonation

34. Which one is not an organic compound

Carbohydrates

Fats

None of these

Cyanides

35. Methane is produced when aluminum carbide is treated with

Acid

Alcohol

Water

Base

36. The functional group isomer of dimethyl –ether is

Prophyl alcohol

Ethyl alcohol

Diethyl pether

Butyl alcohol

37. The characteristic reactions of alkanes are

Condensation reactions

Polymerization

Substitution reactions

Addition reactions

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

SiCl₆²¯ -trigonal bipyramidal

NH₄⁺ - tetrahedral

PH₄⁺ - tetrahedral

ClO₂ - angular

39. Organic compounds are soluble in all except

Benzene

Water

Petroleum

Ether

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

Organic compounds are water soluble

They form long chain compounds

They exist in homologous series

Organic compound chain compounds

41. Peat before conversion to bituminous coal is converted to

Asphalt

None

Lignite

Anthracite

42. The state of hybridization carbon in ethane is

None

SP³

SP²

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

H₂O - bent

NF₃ - trigonal planar

BF₃ - trigonal planar

AsF₅ - trigonal bipyramidal

44. The perchloric acid molecule contains:

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

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

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

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

45. Unsaturated hydrocarbons containing a double bond are called

Alkanes

Olefins

Acetylene

Paraffin

46. 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

Three sigma and one Pi

Sigma

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

Only HF and OF₂

Only HF

None of these

All except SO₃

48. In benzene carbon – carbon bonds are

Single covalent

Double covalent

Of the order 1.5

3 single and 3 double

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

Thiols

Alcohols

Hydrogen sulphides

Sulphides

50. Bromoethane can be converted to ethane by

Reaction with aq KOH

Oxidation

Reaction with alcoholic KOH

Reduction

Page 3 of 5

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

1 band pair 3 lone pair

2 band pair 2 lone pair

3 lone pair 1 bond pair

3 band pair one lone pair

52. 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

53. Which is the solid form of petroleum?

Peat

Wood

Asphalt

Naptha

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

Sp²-hybridization

Dsp²-hybridization

Sp³-hybridization

Sp-hybridization

55. Which of the following is complex?

CH₄

CaSO₄. 0.5H₂O

C₆H₁₂O₆

(C₆H₁₀O₅)n

56. Which of the following has linear shape?

None of these

SP³

SP²

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

Propane

Methane

Butane

Ethane

58. Ether shows the phenomenon of

Cis – trass isomerism

Position isomerism

Chain isomerism

Metamerism

59. C₄H₈ can show isomerism

Functional group

Position

Structural

Geometric

60. Straight chain hydrocarbons are

In which atoms of C are in a series

None of these

Not in a series

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

61. The major portion of natural oil is

Propane

Ethane

Butane

Methane

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

Tetrahedron

Cube

Pentagon

Hexagon

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

Ethanol

Methanol

Glycol

Carbinol

64. The components of petroleum can be separated due to

Having different B.P.

Having different M.P.

Having different physical states

Having different chemical properties

65. Polythene is a polymer of

Ethene

Ethane

Acetone

Propylene

66. Acetylene had a characteristic ethereal smell resembling that of

Garlic

Onion

Vinegar

Ginger

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

Diastereomers

Positional isomers

Conformers

Enantiomers

68. The open chain organic compounds are called

Aromatic

Linear compounds

Both A and B

Aliphatic

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

sp³d

sp²

sp³

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

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

Coke

Coal tar

Coal gas

All above

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

sp³ d

sp²

sp³

73. C₂H₂Cl₂ can show isomerism

Position

Geometric

Functional group

Metamerism

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

Ethanoic acid

Benzene

Acetylene

Ethane

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

Cracking

Hydrogenation

Reforming process

Oxidation

Page 4 of 5

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

Pysidence

Cyclohexanol

Anthracene

Phenol

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

Ether

Ketone

Alcohol

Ethene

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

-O-

None

H-N-

H-O-

79. Which one has zero octane number?

n – Heptane

n – Hexane

iso – octane

decane

80. Isomerism which is only found in alkanes?

Position isomerism

Functional group isomerism

Metamerism

cis – trans isomerism

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

Condensation

Isomerization

Cracking

Polymerization

82. Wholer prepared urea from

Ammonia

NH₃

NH₄CNO

Uric acid

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

It is costly

The combustion product, lead causes air pollution

It damages the engine

Pb is difficult to obtain in bulk qualities

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

CO₂

NH₃

H₂O

CH₄

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

Methane

Ammonium cyanate

Glucose

Urea

86. Which is the character of organic compounds

Rates of reactions are very fast

All

They possess particular properties

Mostly ionic in character

87. Normal by product of cracking is

Benzene

All of these

Butane

Ethane

88. The next homologue of C₁₀H₂₂ will be

C₉H₂₀

C₁₁H₂₄

C₁₃H₂₈

C₁₂H₂₆

89. 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

Thermal cracking

Stem cracking

Catalytic cracking

90. Which of the following species is planar?

SO₃²¯

NH₃

NO₃¯

H₃O⁺

91. Ethyl alcohol on ____________ gives ethane

Hydration

Oxidation

Dehydration

Dehydrogenation

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

NO₂¯ - trigonal palnar

ClO₃¯-tetrahedral

SO₃²¯ - pyramidal

ClO₄¯ - tetrahedral

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

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

Both bonds are broken

None of these

Pi bond is broken

Sigma bond is broken

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

Hybridization

Polymerization

Carbonization

Isomerisation

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

Methyl hydrogen sulphate

Methyl alcohol

Ethyl alcohol

Ethyl hydrogen sulphate

97. Geometry of simple molecule having sp3 hybrid orbital is

Linear

Square planner

Tetrahedral

Triangular

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

H₂O – tetrahedral

CF₄ - tetrahedral

PF₃ - pyramidal

NH₃ - tetrahedral

99. Vital force theory was rejected by

Wholer

Kolbe

Berzelius

Lavoisier

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

Nitration

Sulphonation

Acylation

Alkylation

Page 5 of 5

101. Hybridization explain the ________ of orbitals

Type of Bonding

Shape and Type of bonding

None of these

Shapes

102. On sp3 hybridization

One p-orbital is involved

Four p-orbitals are involved

One s and 3 p-orbitals are involved

All p-orbitals are involved

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

Ethyne

Ethere

Methane

Benzene

104. Which of the following contains single bonds?

Alkene

Alkane

Alkyne

Benzene

105. 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

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

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

Monocyclic

None of these

Homocyclic

Heterocyclic

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

The same viscosity

Same molecular weights

The same vapour density

Different molecular weights

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

Onion

Garlic

Ginger

Vinegar

110. Which is a mixture of low boiling hydrocarbon

Petroleum

Wood

Graphite

Natural gas

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

Functional group isomerism

Metamerism

Chain isomerism

Position isomerism

112. 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

Chain isomers

Position isomers

Metamers

113. Alkanes cannot show cis-trans isomerism

0¯ bond is stronger than A-bond

0¯ bond required less energy to be rotated

Alkanes possess three groups attached to each carbon

The bond angle is 109.5°

114. 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

115. 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.

116. Hydrocarbons contain

C, H, and O only

C, H, O and N only

C and S only

C and H only

117. In catalytic cracking, the typical catalyst used is

SiO₂

SiO₂+Al₂O₃

Al₂O₃

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

90° and 180°

120° only

45° and 90°

90° and 120°

119. Which of the following possess linear geometry

Benzene

Alkane

Alkyne

Alkene

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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

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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

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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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