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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. A π (pi) bond is the result of the

Sidewise overlap of two parallel p orbitals

Overlap of two p orbitals along their axes

Overlap of an s and a p orbital

Overlap of two s orbitals

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

Coal gas

All above

Coal tar

Coke

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

The same vapour density

Different molecular weights

Same molecular weights

The same viscosity

4. The components of petroleum can be separated due to

Having different B.P.

Having different physical states

Having different M.P.

Having different chemical properties

5. Which is a mixture of low boiling hydrocarbon

Graphite

Wood

Natural gas

Petroleum

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

Isomerization

Condensation

Polymerization

Cracking

7. Pi bonds are produced by overlapping of

Hybrid orbitals

Un-hybrid orbitals

Atomic orbital and hybrid orbital

Hybrid and un hybrid orbitals

8. C₂H₂Cl₂ can show isomerism

Geometric

Metamerism

Functional group

Position

9. The functional group isomer of dimethyl –ether is

Ethyl alcohol

Butyl alcohol

Prophyl alcohol

Diethyl pether

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

NH₃

H₂O

CH₄

CO₂

11. Linear shape is shown by which compound

CHCl₃

C₂Cl₂

C₂H₂Cl₂

C₂H₆

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

Ethane

Butane

Methane

Propane

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

It is costly

Pb is difficult to obtain in bulk qualities

It damages the engine

The combustion product, lead causes air pollution

14. The characteristic reactions of alkanes are

Substitution reactions

Condensation reactions

Polymerization

Addition reactions

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

Methyl hydrogen sulphate

Ethyl alcohol

Methyl alcohol

Ethyl hydrogen sulphate

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

Methyl hydrogen sulphate

Ethyl alcohol

Methyl alcohol

Ethyl hydrogen sulphate

17. The active part in a molecule is called:

Functional group

Chemical bonding

Ionic complex

Homologous series

18. Wholer prepared urea from

Ammonia

NH₃

Uric acid

NH₄CNO

19. Geometry of simple molecule having sp3 hybrid orbital is

Square planner

Linear

Tetrahedral

Triangular

20. Which one is not an organic compound

Cyanides

None of these

Fats

Carbohydrates

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

CF₄ - tetrahedral

NH₃ - tetrahedral

PF₃ - pyramidal

H₂O – tetrahedral

22. The demand of gasoline can be fulfilled by

Reforming

Vapourization

Crystallization

Cracking

23. Methane is produced when aluminum carbide is treated with

Alcohol

Water

Base

Acid

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

Antheracite

Wood

Peat

Coal tar

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

NF₃ - trigonal planar

AsF₅ - trigonal bipyramidal

H₂O - bent

BF₃ - trigonal planar

Page 2 of 5

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

Phenol

Cyclohexanol

Anthracene

Pysidence

27. Coal is obtained from dead remains of

None

Animals

Plants

Both a and b

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

sp²

sp³d

sp³

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

Tetrahedron

Pentagon

Cube

Hexagon

30. Either show the phenomenon of

Metamerism

Cis-trans isomerism

Position isomerism

Functional group isomerism

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

Positional isomers

Diastereomers

Conformers

Enantiomers

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

Ether

Ethene

Ketone

Alcohol

33. The self-linking of carbon atoms is called

Catenation

Chelation

None of these

Isomerism

34. The open chain organic compounds are called

Linear compounds

Aromatic

Both A and B

Aliphatic

35. The number of isomers of C₆H₁₄ is:

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

Urea

Methane

Ammonium cyanate

Glucose

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

Hydrogenation

Reforming process

Oxidation

Cracking

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

Metamerism

Functional group isomerism

Chain isomerism

Position isomerism

39. Which of the following possess linear geometry

Alkyne

Alkane

Alkene

Benzene

40. Straight chain hydrocarbons are

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

Not in a series

In which atoms of C are in a series

None of these

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

Acylation

Nitration

Sulphonation

Alkylation

42. Petroleum is mainly a mixture of

Unsaturated hydrocarbon

Compounds of S

Phenols

Saturated hydrocarbons

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

Wood

Coal

Natural gas

Petroleum

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

SO₃²¯ - pyramidal

ClO₄¯ - tetrahedral

NO₂¯ - trigonal palnar

ClO₃¯-tetrahedral

45. Which molecule is nonpolar?

H₂Se

BeH₂

PF₃

CHCl₃

46. 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

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

48. In benzene carbon – carbon bonds are

Of the order 1.5

3 single and 3 double

Single covalent

Double covalent

49. Bromoethane can be converted to ethane by

Reduction

Oxidation

Reaction with aq KOH

Reaction with alcoholic KOH

50. Vital force theory was rejected by

Wholer

Berzelius

Lavoisier

Kolbe

Page 3 of 5

51. Hydrocarbons contain

C and H only

C, H, and O only

C and S only

C, H, O and N only

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

Butanal

2-butyne

2-butanol

2-butene

53. An isomer of ethanol is:

Dimethyl ether

Methanol

Diethyl ether

Acetone

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

90° and 180°

45° and 90°

120° only

90° and 120°

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

They exist in homologous series

Organic compounds are water soluble

They form long chain compounds

Organic compound chain compounds

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

Ethanoic acid

Benzene

Acetylene

Ethane

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

58. On sp3 hybridization

One p-orbital is involved

One s and 3 p-orbitals are involved

All p-orbitals are involved

Four p-orbitals are involved

59. The structure of benzene is

Hexagonal

Pyramidal

Square planer

Tetrahedral

60. Acetylene had a characteristic ethereal smell resembling that of

Garlic

Vinegar

Onion

Ginger

61. Which is the character of organic compounds

Rates of reactions are very fast

Mostly ionic in character

They possess particular properties

All

62. Polythene is a polymer of

Propylene

Acetone

Ethane

Ethene

63. Which of the following contains single bonds?

Alkene

Alkyne

Alkane

Benzene

64. Ether shows the phenomenon of

Metamerism

Position isomerism

Chain isomerism

Cis – trass isomerism

65. Peat before conversion to bituminous coal is converted to

Asphalt

Lignite

Anthracite

None

66. The octane number is 100 for

Neo-Pentane

Isooctane

n-hexane

Neo-octane

67. The major portion of natural oil is

Ethane

Methane

Propane

Butane

68. Unsaturated hydrocarbons containing a double bond are called

Acetylene

Olefins

Alkanes

Paraffin

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

3 band pair one lone pair

3 lone pair 1 bond pair

1 band pair 3 lone pair

2 band pair 2 lone pair

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

Magnetic

Saturated

Para-magnetic

Un-saturated

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

72. Organic compounds are soluble in all except

Water

Benzene

Petroleum

Ether

73. Normal by product of cracking is

All of these

Butane

Benzene

Ethane

74. Which of the following is complex?

CH₄

(C₆H₁₀O₅)n

CaSO₄. 0.5H₂O

C₆H₁₂O₆

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

Domestic use

Bake bricks

In glass industry

Sugar industry

Page 4 of 5

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

Ethere

Benzene

Ethyne

Methane

77. 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

Sigma

One sigma and three Pi

Two sigma and two Pi

Three sigma and one Pi

78. Which of the following has linear shape?

None of these

SP²

SP³

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

Sp-hybridization

Sp²-hybridization

Dsp²-hybridization

Sp³-hybridization

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

Pi bond is broken

None of these

Both bonds are broken

Sigma bond is broken

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

It is more stable

It is less stable

The molecule is asymmetrical around C – C bond

The molecule is symmetrical around C – C

82. Which of the following species is planar?

H₃O⁺

NO₃¯

SO₃²¯

NH₃

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

Ethyne

Ethane

Methane

Ethene

84. The essential component of organic compound is

85. The state of hybridization carbon in ethane is

SP³

SP²

None

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

Alkyne

Alkene

Benzene

Alkane

87. In C₂H₂ carbon-carbon bond angle is

109.5°

120°

90°

180°

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

- OH group

+NH₂ group

-CHO group

-CH₃ group

89. 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

90. Which one has zero octane number?

decane

iso – octane

n – Heptane

n – Hexane

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

104.5°

109.5°

120.5°

107.5°

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

Heterocyclic

None of these

Homocyclic

Monocyclic

93. In which molecule carbon atom is sp² hybridized

C₂H₄

CH₄

None of these

C₂H₂

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

Carbinol

Methanol

Ethanol

Glycol

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

0, 3

2, 1

1, 2

3, 0

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

SiCl₆²¯ -trigonal bipyramidal

PH₄⁺ - tetrahedral

ClO₂ - angular

NH₄⁺ - tetrahedral

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

Acylation

Nitration

Alkylation

Sulphonation

98. 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

99. 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

100. Ethyl alcohol on ____________ gives ethane

Dehydrogenation

Hydration

Oxidation

Dehydration

Page 5 of 5

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

All except SO₃

Only HF

Only HF and OF₂

None of these

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

H-N-

H-O-

-O-

None

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. Organic compounds resemble to those of inorganic compounds having same

Isomerism

Carbon forming long chain or rings

Ionic properties

Chemical forces

105. Isomerism which is only found in alkanes?

Position isomerism

Functional group isomerism

Metamerism

cis – trans isomerism

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

Hybridization

Isomerisation

Polymerization

Carbonization

107. Rates of organic reactions are

None-reactive

Very fast

Fast

Slow

108. 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

Thermal cracking

Normal cracking

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

Onion

Garlic

Vinegar

Ginger

110. In catalytic cracking, the typical catalyst used is

Al₂O₃

SiO₂

SiO₂+Al₂O₃

111. 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

Chain isomers

Functional isomers

Position isomers

Metamers

112. Hybridization explain the ________ of orbitals

Type of Bonding

Shape and Type of bonding

Shapes

None of these

113. Which is the solid form of petroleum?

Naptha

Wood

Asphalt

Peat

114. 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

Alkenes do not undergo addition reactions

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

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

Alcohols

Thiols

Hydrogen sulphides

Sulphides

116. The perchloric acid molecule contains:

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

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.

117. C₄H₈ can show isomerism

Position

Functional group

Structural

Geometric

118. The next homologue of C₁₀H₂₂ will be

C₁₂H₂₆

C₁₃H₂₈

C₁₁H₂₄

C₉H₂₀

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

sp²

sp³

sp³ d

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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

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

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