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ECAT Chemistry Fundamental Principles of Organic Chemistry Test Online

Maan AliLast Updated: April 19, 2025

Chemistry Fundamental Principles of Organic Chemistry MCQS Online Test

ECAT 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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ECAT Chemistry Fundamental Principles of Organic Chemistry Test

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Page 1 of 5

Chemistry

1. The state of hybridization carbon in ethane is

SP³

None

SP²

2. The characteristic reactions of alkanes are

Polymerization

Addition reactions

Substitution reactions

Condensation reactions

3. Isomerism which is only found in alkanes?

Position isomerism

Metamerism

cis – trans isomerism

Functional group isomerism

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

Ethyne

Ethere

Benzene

Methane

5. The carbocyclic compounds are those which have

All atoms are SP² -hybridized

All atoms in the ring are carbon

May be other atoms

All atoms are SP³ -hybridized

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

-O-

None

H-N-

H-O-

7. Which of the following has linear shape?

None of these

SP³

SP²

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

Isomerization

Polymerization

Cracking

Condensation

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

Sugar industry

In glass industry

Bake bricks

Domestic use

10. The essential component of organic compound is

11. Which is the character of organic compounds

They possess particular properties

All

Rates of reactions are very fast

Mostly ionic in character

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

Sp-hybridization

Dsp²-hybridization

Sp³-hybridization

Sp²-hybridization

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

90° and 120°

45° and 90°

120° only

90° and 180°

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

Anthracene

Phenol

Pysidence

Cyclohexanol

15. The octane number is 100 for

n-hexane

Neo-Pentane

Isooctane

Neo-octane

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

Overlap of two p orbitals along their axes

Overlap of an s and a p orbital

Overlap of two s orbitals

Sidewise overlap of two parallel p orbitals

17. The structure of benzene is

Tetrahedral

Square planer

Hexagonal

Pyramidal

18. 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

Chain isomers

Functional isomers

Position isomers

19. 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

20. 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

Catalytic cracking

Thermal cracking

Normal cracking

21. Which is the solid form of petroleum?

Peat

Wood

Asphalt

Naptha

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

CO₂

NH₃

H₂O

CH₄

23. The active part in a molecule is called:

Functional group

Ionic complex

Homologous series

Chemical bonding

24. On sp3 hybridization

One s and 3 p-orbitals are involved

One p-orbital is involved

All p-orbitals are involved

Four p-orbitals are involved

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

ClO₄¯ - tetrahedral

NO₂¯ - trigonal palnar

ClO₃¯-tetrahedral

SO₃²¯ - pyramidal

Page 2 of 5

26. The perchloric acid molecule contains:

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

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

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

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

27. C₄H₈ can show isomerism

Structural

Geometric

Position

Functional group

28. Either show the phenomenon of

Functional group isomerism

Metamerism

Position isomerism

Cis-trans isomerism

29. 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

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

sp²

sp³

sp³ d

31. 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

Ethane

Ethene

Methane

Benzene

32. The components of petroleum can be separated due to

Having different M.P.

Having different physical states

Having different B.P.

Having different chemical properties

33. Hydrocarbons contain

C, H, O and N only

C, H, and O only

C and H only

C and S only

34. Geometry of simple molecule having sp3 hybrid orbital is

Linear

Triangular

Tetrahedral

Square planner

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

Polymerization

Isomerisation

Carbonization

Hybridization

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

The same vapour density

Different molecular weights

The same viscosity

Same molecular weights

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

They exist in homologous series

Organic compound chain compounds

Organic compounds are water soluble

They form long chain compounds

38. Unsaturated hydrocarbons containing a double bond are called

Paraffin

Acetylene

Alkanes

Olefins

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

Pb is difficult to obtain in bulk qualities

It is costly

The combustion product, lead causes air pollution

It damages the engine

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

2-butene

2-butanol

2-butyne

Butanal

41. An isomer of ethanol is:

Dimethyl ether

Methanol

Acetone

Diethyl ether

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

Ethane

Methane

Propane

Butane

43. Peat before conversion to bituminous coal is converted to

None

Asphalt

Anthracite

Lignite

44. The next homologue of C₁₀H₂₂ will be

C₁₃H₂₈

C₁₁H₂₄

C₁₂H₂₆

C₉H₂₀

45. The open chain organic compounds are called

Aliphatic

Linear compounds

Both A and B

Aromatic

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

sp²

sp³d

sp³

47. Acetylene had a characteristic ethereal smell resembling that of

Onion

Vinegar

Ginger

Garlic

48. Organic compounds are soluble in all except

Water

Petroleum

Ether

Benzene

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

NH₃ - tetrahedral

CF₄ - tetrahedral

H₂O – tetrahedral

PF₃ - pyramidal

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

None of these

All except SO₃

Only HF and OF₂

Only HF

Page 3 of 5

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

Chemical forces

Carbon forming long chain or rings

Isomerism

Ionic properties

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

Position isomerism

Functional group isomerism

Metamerism

Chain isomerism

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

Acetylene

Benzene

Ethanoic acid

Ethane

54. Rates of organic reactions are

Fast

Slow

Very fast

None-reactive

55. Methane is produced when aluminum carbide is treated with

Water

Acid

Alcohol

Base

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

57. Ethyl alcohol on ____________ gives ethane

Dehydrogenation

Dehydration

Oxidation

Hydration

58. 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

59. Alkanes cannot show cis-trans isomerism

0¯ bond required less energy to be rotated

Alkanes possess three groups attached to each carbon

0¯ bond is stronger than A-bond

The bond angle is 109.5°

60. Polythene is a polymer of

Ethane

Propylene

Acetone

Ethene

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

Un-saturated

Saturated

Para-magnetic

Magnetic

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

Alcohol

Ethene

Ketone

Ether

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

+NH₂ group

- OH group

-CHO group

-CH₃ group

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

Coal gas

Coal tar

Coke

All above

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

Ginger

Vinegar

Onion

Garlic

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

Coal

Natural gas

Petroleum

Wood

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

Reforming process

Hydrogenation

Oxidation

Cracking

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

Alkyne

Alkene

Alkane

Benzene

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

Positional isomers

Enantiomers

Conformers

Diastereomers

70. 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

71. Which of the following species is planar?

H₃O⁺

SO₃²¯

NO₃¯

NH₃

72. Vital force theory was rejected by

Lavoisier

Kolbe

Berzelius

Wholer

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

3 band pair one lone pair

2 band pair 2 lone pair

3 lone pair 1 bond pair

1 band pair 3 lone pair

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

None of these

Monocyclic

Heterocyclic

Homocyclic

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

SiCl₆²¯ -trigonal bipyramidal

PH₄⁺ - tetrahedral

ClO₂ - angular

NH₄⁺ - tetrahedral

Page 4 of 5

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

Ethanol

Glycol

Carbinol

Methanol

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

78. In benzene carbon – carbon bonds are

Single covalent

3 single and 3 double

Of the order 1.5

Double covalent

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

Acylation

Sulphonation

Nitration

Alkylation

80. C₂H₂Cl₂ can show isomerism

Functional group

Geometric

Metamerism

Position

81. Which of the following contains single bonds?

Alkene

Alkyne

Benzene

Alkane

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

Methane

Urea

Ammonium cyanate

Glucose

83. In which molecule carbon atom is sp² hybridized

C₂H₂

CH₄

None of these

C₂H₄

84. Which one is not an organic compound

Fats

None of these

Carbohydrates

Cyanides

85. Which statement is true regarding reactivity?

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

Towards the addition reaction alkenes are more reactive than alkynes

Alkenes do not undergo addition reactions

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

Cube

Hexagon

Pentagon

Tetrahedron

87. Coal is obtained from dead remains of

Both a and b

None

Plants

Animals

88. Which of the following possess linear geometry

Alkane

Alkene

Benzene

Alkyne

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

Methane

Ethyne

Ethene

Ethane

90. Normal by product of cracking is

Ethane

All of these

Benzene

Butane

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

H₂O - bent

BF₃ - trigonal planar

NF₃ - trigonal planar

AsF₅ - trigonal bipyramidal

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

Peat

Wood

Antheracite

Coal tar

93. The demand of gasoline can be fulfilled by

Reforming

Vapourization

Crystallization

Cracking

94. 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

95. Which one has zero octane number?

decane

n – Hexane

iso – octane

n – Heptane

96. In catalytic cracking, the typical catalyst used is

SiO₂+Al₂O₃

Al₂O₃

SiO₂

97. 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

Two sigma and two Pi

One sigma and three Pi

Three sigma and one Pi

98. Petroleum is mainly a mixture of

Unsaturated hydrocarbon

Saturated hydrocarbons

Phenols

Compounds of S

99. Ether shows the phenomenon of

Metamerism

Position isomerism

Chain isomerism

Cis – trass isomerism

100. In C₂H₂ carbon-carbon bond angle is

90°

109.5°

120°

180°

Page 5 of 5

101. The functional group isomer of dimethyl –ether is

Ethyl alcohol

Diethyl pether

Prophyl alcohol

Butyl alcohol

102. Linear shape is shown by which compound

C₂H₂Cl₂

C₂H₆

CHCl₃

C₂Cl₂

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

It is less stable

The molecule is asymmetrical around C – C bond

It is more stable

The molecule is symmetrical around C – C

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

Sulphonation

Alkylation

Acylation

Nitration

105. Which molecule is nonpolar?

H₂Se

PF₃

BeH₂

CHCl₃

106. Which of the following is complex?

C₆H₁₂O₆

(C₆H₁₀O₅)n

CaSO₄. 0.5H₂O

CH₄

107. Hybridization explain the ________ of orbitals

Shapes

Shape and Type of bonding

None of these

Type of Bonding

108. Pi bonds are produced by overlapping of

Hybrid and un hybrid orbitals

Hybrid orbitals

Atomic orbital and hybrid orbital

Un-hybrid orbitals

109. The number of isomers of C₆H₁₄ is:

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

1, 2

3, 0

2, 1

0, 3

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

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

Ethyl hydrogen sulphate

Methyl hydrogen sulphate

Methyl alcohol

Ethyl alcohol

113. Bromoethane can be converted to ethane by

Reaction with aq KOH

Oxidation

Reduction

Reaction with alcoholic KOH

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

Alcohols

Hydrogen sulphides

Thiols

Sulphides

115. Which is a mixture of low boiling hydrocarbon

Graphite

Petroleum

Natural gas

Wood

116. The self-linking of carbon atoms is called

None of these

Chelation

Isomerism

Catenation

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

107.5°

120.5°

104.5°

109.5°

118. The major portion of natural oil is

Propane

Butane

Ethane

Methane

119. Wholer prepared urea from

NH₄CNO

Ammonia

Uric acid

NH₃

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Maan AliLast Updated: April 19, 2025

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6 Comments

Rabbia says:

July 27, 2017 at 7:42 pm

Is this important mcqs? ?

1. Zeeshan says:
  
  July 14, 2022 at 10:09 am
  
  IS my sy kuch important hn but zyada trr benzene or Alkyl halide waly chapter sy aaty hn orr 8 chapter Alkane,Alkene or lkyne wala !!!
  
abdulrehman ali says:

July 2, 2017 at 11:15 pm

yehi to pta nai

Qureshi148 says:

July 1, 2017 at 8:15 pm

bkwaas bilkul bkwaas

Pervez says:

March 22, 2017 at 1:40 pm

nice

Farhan aslam says:

November 29, 2016 at 11:15 am

In me se kich aata bhi ha?

ECAT Chemistry Fundamental Principles of Organic Chemistry Test Online

Chemistry Fundamental Principles of Organic Chemistry MCQS Online Test

ECAT Chemistry Fundamental Principles of Organic Chemistry Chapter Online Test

ECAT Chemistry Fundamental Principles of Organic Chemistry Test

Chemistry

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Chemistry Fundamental Principles of Organic Chemistry MCQS Online Test

ECAT Chemistry Fundamental Principles of Organic Chemistry Chapter Online Test

ECAT Chemistry Fundamental Principles of Organic Chemistry Test

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