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

H-N-

H-O-

None

-O-

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

Both bonds are broken

Pi bond is broken

Sigma bond is broken

None of these

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

4. Which is the solid form of petroleum?

Naptha

Peat

Asphalt

Wood

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

H₂O – tetrahedral

NH₃ - tetrahedral

CF₄ - tetrahedral

PF₃ - pyramidal

6. Either show the phenomenon of

Functional group isomerism

Position isomerism

Metamerism

Cis-trans isomerism

7. Which of the following has linear shape?

None of these

SP²

SP³

8. Hydrocarbons contain

C and H only

C, H, O and N only

C and S only

C, H, and O only

9. Which of the following is complex?

(C₆H₁₀O₅)n

C₆H₁₂O₆

CaSO₄. 0.5H₂O

CH₄

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

Ethane

Methane

Ethene

Ethyne

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

Ethyl alcohol

Methyl alcohol

Methyl hydrogen sulphate

Ethyl hydrogen sulphate

12. Bromoethane can be converted to ethane by

Reaction with alcoholic KOH

Oxidation

Reaction with aq KOH

Reduction

13. The major portion of natural oil is

Methane

Butane

Propane

Ethane

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

CH₄

NH₃

H₂O

CO₂

15. The number of isomers of C₆H₁₄ is:

16. 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

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

Butane

Ethane

Methane

Propane

18. Petroleum is mainly a mixture of

Compounds of S

Phenols

Unsaturated hydrocarbon

Saturated hydrocarbons

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

Isomerisation

Carbonization

Polymerization

Hybridization

20. The active part in a molecule is called:

Ionic complex

Chemical bonding

Homologous series

Functional group

21. The perchloric acid molecule contains:

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

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

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

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

22. Which of the following contains single bonds?

Alkyne

Alkene

Benzene

Alkane

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

3, 0

2, 1

1, 2

0, 3

24. Isomerism which is only found in alkanes?

Functional group isomerism

Metamerism

Position isomerism

cis – trans isomerism

25. The functional group isomer of dimethyl –ether is

Ethyl alcohol

Butyl alcohol

Prophyl alcohol

Diethyl pether

Page 2 of 5

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

NO₂¯ - trigonal palnar

SO₃²¯ - pyramidal

ClO₃¯-tetrahedral

ClO₄¯ - tetrahedral

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

Benzene

Ethanoic acid

Ethane

Acetylene

28. Polythene is a polymer of

Ethene

Propylene

Ethane

Acetone

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

Coke

All above

Coal gas

Coal tar

30. Peat before conversion to bituminous coal is converted to

Asphalt

None

Lignite

Anthracite

31. Methane is produced when aluminum carbide is treated with

Alcohol

Base

Acid

Water

32. Linear shape is shown by which compound

C₂Cl₂

CHCl₃

C₂H₆

C₂H₂Cl₂

33. Acetylene had a characteristic ethereal smell resembling that of

Vinegar

Onion

Ginger

Garlic

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

Benzene

Alkane

Alkyne

Alkene

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

Onion

Garlic

Ginger

Vinegar

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

Peat

Coal tar

Antheracite

Wood

37. The essential component of organic compound is

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

-CHO group

-CH₃ group

+NH₂ group

- OH group

39. Which is the character of organic compounds

They possess particular properties

Mostly ionic in character

All

Rates of reactions are very fast

40. The components of petroleum can be separated due to

Having different M.P.

Having different physical states

Having different chemical properties

Having different B.P.

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

Butanal

2-butene

2-butyne

2-butanol

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

sp²

sp³ d

sp³

43. Which is a mixture of low boiling hydrocarbon

Natural gas

Wood

Petroleum

Graphite

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

1 band pair 3 lone pair

3 lone pair 1 bond pair

2 band pair 2 lone pair

3 band pair one lone pair

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

None of these

Monocyclic

Heterocyclic

Homocyclic

46. Which molecule is nonpolar?

CHCl₃

PF₃

H₂Se

BeH₂

47. The self-linking of carbon atoms is called

Isomerism

Chelation

Catenation

None of these

48. In benzene carbon – carbon bonds are

Of the order 1.5

3 single and 3 double

Double covalent

Single covalent

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

Glucose

Urea

Ammonium cyanate

Methane

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

Hydrogenation

Oxidation

Cracking

Reforming process

Page 3 of 5

51. 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

Sigma

Two sigma and two Pi

One sigma and three Pi

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

NH₄⁺ - tetrahedral

SiCl₆²¯ -trigonal bipyramidal

PH₄⁺ - tetrahedral

ClO₂ - angular

53. Which of the following possess linear geometry

Benzene

Alkane

Alkene

Alkyne

54. In which molecule carbon atom is sp² hybridized

C₂H₄

C₂H₂

None of these

CH₄

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

All except SO₃

Only HF and OF₂

None of these

Only HF

56. 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

Ethane

Benzene

Ethene

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

Metamerism

Chain isomerism

Functional group isomerism

Position isomerism

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

The same viscosity

The same vapour density

Same molecular weights

Different molecular weights

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

120.5°

109.5°

104.5°

107.5°

60. In C₂H₂ carbon-carbon bond angle is

90°

180°

109.5°

120°

61. Straight chain hydrocarbons are

Not in a series

None of these

In which atoms of C are in a series

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

62. In catalytic cracking, the typical catalyst used is

Al₂O₃

SiO₂

SiO₂+Al₂O₃

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

Sulphides

Thiols

Alcohols

Hydrogen sulphides

64. Hybridization explain the ________ of orbitals

Shape and Type of bonding

None of these

Type of Bonding

Shapes

65. On sp3 hybridization

One p-orbital is involved

All p-orbitals are involved

One s and 3 p-orbitals are involved

Four p-orbitals are involved

66. The structure of benzene is

Square planer

Pyramidal

Hexagonal

Tetrahedral

67. 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

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

Sugar industry

Bake bricks

In glass industry

Domestic use

69. The components of petroleum can be separated due to

Having different physical states

Having different B.P.

Having different M.P.

Having different chemical properties

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

Tetrahedron

Hexagon

Pentagon

Cube

71. 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 p orbitals along their axes

Overlap of two s orbitals

72. Organic compounds are soluble in all except

Water

Ether

Benzene

Petroleum

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

Acylation

Sulphonation

Nitration

Alkylation

74. Geometry of simple molecule having sp3 hybrid orbital is

Triangular

Tetrahedral

Linear

Square planner

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

sp³

sp²

sp³d

Page 4 of 5

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

120° only

90° and 180°

90° and 120°

45° and 90°

77. The state of hybridization carbon in ethane is

None

SP³

SP²

78. Which one has zero octane number?

iso – octane

decane

n – Hexane

n – Heptane

79. Ethyl alcohol on ____________ gives ethane

Oxidation

Dehydration

Hydration

Dehydrogenation

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

Conformers

Positional isomers

Diastereomers

Enantiomers

81. Which one is not an organic compound

Carbohydrates

None of these

Fats

Cyanides

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

Saturated

Un-saturated

Para-magnetic

Magnetic

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

Ionic properties

Carbon forming long chain or rings

Isomerism

Chemical forces

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

Phenol

Cyclohexanol

Anthracene

Pysidence

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

Alkylation

Sulphonation

Nitration

Acylation

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

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

It damages the engine

It is costly

The combustion product, lead causes air pollution

Pb is difficult to obtain in bulk qualities

88. Which of the following species is planar?

NO₃¯

H₃O⁺

NH₃

SO₃²¯

89. Normal by product of cracking is

All of these

Benzene

Ethane

Butane

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

NF₃ - trigonal planar

H₂O - bent

AsF₅ - trigonal bipyramidal

BF₃ - trigonal planar

91. Which statement is true regarding reactivity?

Towards the addition reaction alkenes are more reactive than alkynes

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

92. The demand of gasoline can be fulfilled by

Crystallization

Reforming

Cracking

Vapourization

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

Glycol

Methanol

Ethanol

Carbinol

94. Unsaturated hydrocarbons containing a double bond are called

Olefins

Acetylene

Paraffin

Alkanes

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

Ethyne

Methane

Benzene

Ethere

96. An isomer of ethanol is:

Dimethyl ether

Acetone

Methanol

Diethyl ether

97. The next homologue of C₁₀H₂₂ will be

C₉H₂₀

C₁₃H₂₈

C₁₁H₂₄

C₁₂H₂₆

98. Vital force theory was rejected by

Kolbe

Berzelius

Lavoisier

Wholer

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

Wood

Coal

Petroleum

Natural gas

100. 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

Normal cracking

Thermal cracking

Stem cracking

Page 5 of 5

101. The octane number is 100 for

Neo-Pentane

Neo-octane

Isooctane

n-hexane

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

Condensation

Cracking

Isomerization

Polymerization

103. Pi bonds are produced by overlapping of

Hybrid and un hybrid orbitals

Un-hybrid orbitals

Atomic orbital and hybrid orbital

Hybrid orbitals

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

They exist in homologous series

Organic compounds are water soluble

Organic compound chain compounds

They form long chain compounds

105. The carbocyclic compounds are those which have

All atoms are SP³ -hybridized

All atoms in the ring are carbon

All atoms are SP² -hybridized

May be other atoms

106. The open chain organic compounds are called

Linear compounds

Both A and B

Aromatic

Aliphatic

107. The characteristic reactions of alkanes are

Addition reactions

Polymerization

Condensation reactions

Substitution reactions

108. Rates of organic reactions are

Fast

None-reactive

Slow

Very fast

109. Alkanes cannot show cis-trans isomerism

0¯ bond required less energy to be rotated

0¯ bond is stronger than A-bond

Alkanes possess three groups attached to each carbon

The bond angle is 109.5°

110. 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

Metamers

Functional isomers

Chain isomers

111. Wholer prepared urea from

Uric acid

NH₃

Ammonia

NH₄CNO

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

It is more stable

It is less stable

The molecule is symmetrical around C – C

The molecule is asymmetrical around C – C bond

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

Ketone

Ether

Alcohol

Ethene

114. C₂H₂Cl₂ can show isomerism

Metamerism

Position

Functional group

Geometric

115. Coal is obtained from dead remains of

Both a and b

Animals

Plants

None

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

117. C₄H₈ can show isomerism

Structural

Functional group

Geometric

Position

118. Ether shows the phenomenon of

Cis – trass isomerism

Metamerism

Position isomerism

Chain isomerism

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

Methyl alcohol

Methyl hydrogen sulphate

Ethyl alcohol

Ethyl hydrogen sulphate

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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

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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