Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. Rates of organic reactions are

Answer

None-reactive

Question 2

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

Answer

Isomerization

Answer

Polymerization

Answer

Condensation

Question 3

3. Petroleum is mainly a mixture of

Answer

Unsaturated hydrocarbon

Answer

Saturated hydrocarbons

Answer

Compounds of S

Question 4

4. Which one has zero octane number?

Answer

iso – octane

Answer

n – Hexane

Answer

n – Heptane

Question 5

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

Question 6

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

Question 7

7. Which is the character of organic compounds

Answer

They possess particular properties

Answer

Mostly ionic in character

Answer

Rates of reactions are very fast

Question 8

8. Alkanes cannot show cis-trans isomerism

Answer

The bond angle is 109.5°

Answer

0¯ bond is stronger than A-bond

Answer

0¯ bond required less energy to be rotated

Answer

Alkanes possess three groups attached to each carbon

Question 9

9. Which of the following contains single bonds?

Question 10

10. The self-linking of carbon atoms is called

Answer

Catenation

Answer

None of these

Question 11

11. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 12

12. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 13

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

Answer

The same viscosity

Answer

Same molecular weights

Answer

Different molecular weights

Answer

The same vapour density

Question 14

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

Question 15

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

Answer

ClO₄¯ - tetrahedral

Answer

NO₂¯ - trigonal palnar

Answer

ClO₃¯-tetrahedral

Answer

SO₃²¯ - pyramidal

Question 16

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

Answer

Ammonium cyanate

Question 17

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

Answer

Hydrogen sulphides

Question 18

18. Hybridization explain the ________ of orbitals

Answer

None of these

Answer

Type of Bonding

Answer

Shape and Type of bonding

Question 19

19. Bromoethane can be converted to ethane by

Answer

Reaction with alcoholic KOH

Answer

Reaction with aq KOH

Question 20

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:

Answer

Stem cracking

Answer

Thermal cracking

Answer

Normal cracking

Answer

Catalytic cracking

Question 21

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

Answer

Ionic properties

Answer

Carbon forming long chain or rings

Answer

Chemical forces

Question 22

22. Which of the following possess linear geometry

Question 23

23. The state of hybridization carbon in ethane is

Question 24

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

Answer

45° and 90°

Answer

120° only

Answer

90° and 120°

Answer

90° and 180°

Question 25

25. The characteristic reactions of alkanes are

Answer

Polymerization

Answer

Substitution reactions

Answer

Condensation reactions

Answer

Addition reactions

Question 26

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

Answer

Reforming process

Answer

Hydrogenation

Question 27

27. The major portion of natural oil is

Question 28

28. The essential component of organic compound is

Question 29

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

Answer

Ethanoic acid

Question 30

30. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 31

31. Pi bonds are produced by overlapping of

Answer

Hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Hybrid and un hybrid orbitals

Answer

Un-hybrid orbitals

Question 32

32. In benzene carbon – carbon bonds are

Answer

Of the order 1.5

Answer

Single covalent

Answer

Double covalent

Answer

3 single and 3 double

Question 33

33. Ether shows the phenomenon of

Answer

Position isomerism

Answer

Metamerism

Answer

Chain isomerism

Answer

Cis – trass isomerism

Question 34

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

Question 35

35. C₂H₂Cl₂ can show isomerism

Answer

Metamerism

Answer

Functional group

Question 36

36. The next homologue of C₁₀H₂₂ will be

Answer

C₁₂H₂₆

Answer

C₁₃H₂₈

Answer

C₉H₂₀

Answer

C₁₁H₂₄

Question 37

37. Wholer prepared urea from

Question 38

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

Question 39

39. Polythene is a polymer of

Question 40

40. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 41

41. Acetylene had a characteristic ethereal smell resembling that of

Question 42

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

Question 43

43. The demand of gasoline can be fulfilled by

Answer

Crystallization

Answer

Vapourization

Question 44

44. The number of isomers of C₆H₁₄ is:

Question 45

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

Question 46

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

Answer

Two sigma and two Pi

Answer

Three sigma and one Pi

Answer

One sigma and three Pi

Question 47

47. The components of petroleum can be separated due to

Answer

Having different chemical properties

Answer

Having different B.P.

Answer

Having different physical states

Answer

Having different M.P.

Question 48

48. C₄H₈ can show isomerism

Answer

Structural

Answer

Functional group

Question 49

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

Question 50

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

Question 51

51. Vital force theory was rejected by

Question 52

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

Answer

Para-magnetic

Answer

Un-saturated

Question 53

53. Methane is produced when aluminum carbide is treated with

Question 54

54. The structure of benzene is

Answer

Tetrahedral

Answer

Square planer

Question 55

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

Answer

Ethyl alcohol

Answer

Methyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Ethyl hydrogen sulphate

Question 56

56. The active part in a molecule is called:

Answer

Chemical bonding

Answer

Functional group

Answer

Ionic complex

Answer

Homologous series

Question 57

57. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 58

58. The octane number is 100 for

Answer

Neo-octane

Answer

Neo-Pentane

Question 59

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

Answer

Antheracite

Question 60

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

Answer

Sulphonation

Answer

Alkylation

Question 61

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

Answer

Organic compound chain compounds

Answer

Organic compounds are water soluble

Answer

They form long chain compounds

Answer

They exist in homologous series

Question 62

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

Question 63

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

Answer

In glass industry

Answer

Sugar industry

Answer

Bake bricks

Answer

Domestic use

Question 64

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

Answer

3 band pair one lone pair

Answer

3 lone pair 1 bond pair

Answer

2 band pair 2 lone pair

Answer

1 band pair 3 lone pair

Answer 118

Having different M.P.

Answer 119

Having different chemical properties

Answer 120

Having different physical states

Answer 121

Having different B.P.

Answer 122

Dsp²-hybridization

Answer 123

Sp³-hybridization

Answer 124

Sp-hybridization

Answer 125

Sp²-hybridization

Answer 126

Chain isomerism

Answer 127

Position isomerism

Answer 128

Functional group isomerism

Answer 129

Metamerism

Answer 130

Chain isomers

Answer 131

Position isomers

Answer 132

Functional isomers

Answer 133

Dehydrogenation

Answer 134

Dehydration

Answer 135

All atoms are SP² -hybridized

Answer 136

All atoms are SP³ -hybridized

Answer 137

All atoms in the ring are carbon

Answer 138

May be other atoms

Answer 139

PH₄⁺ - tetrahedral

Answer 140

NH₄⁺ - tetrahedral

Answer 141

ClO₂ - angular

Answer 142

SiCl₆²¯ -trigonal bipyramidal

Answer 143

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

Answer 144

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

Answer 145

Towards the addition reaction alkenes are more reactive than alkynes

Answer 146

Alkenes do not undergo addition reactions

Answer 147

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

Answer 148

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

Answer 149

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

Answer 150

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

Answer 151

Functional group isomerism

Answer 152

cis – trans isomerism

Answer 153

Metamerism

Answer 154

Position isomerism

Answer 155

Sidewise overlap of two parallel p orbitals

Answer 156

Overlap of an s and a p orbital

Answer 157

Overlap of two s orbitals

Answer 158

Overlap of two p orbitals along their axes

Answer 159

Functional group isomerism

Answer 160

Position isomerism

Answer 161

Cis-trans isomerism

Answer 162

Metamerism

Answer 163

Tetrahedron

Answer 164

Alkylation

Answer 165

Sulphonation

Answer 166

Anthracite

Answer 167

Four p-orbitals are involved

Answer 168

One s and 3 p-orbitals are involved

Answer 169

One p-orbital is involved

Answer 170

All p-orbitals are involved

Answer 171

BF₃ - trigonal planar

Answer 172

H₂O - bent

Answer 173

NF₃ - trigonal planar

Answer 174

AsF₅ - trigonal bipyramidal

Answer 175

Not in a series

Answer 176

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

Answer 177

In which atoms of C are in a series

Answer 178

None of these

Answer 179

Both bonds are broken

Answer 180

Pi bond is broken

Answer 181

Sigma bond is broken

Answer 182

None of these

Answer 183

None of these

Answer 184

C, H, and O only

Answer 185

C and S only

Answer 186

C and H only

Answer 187

C, H, O and N only

Answer 188

-CHO group

Answer 189

-CH₃ group

Answer 190

- OH group

Answer 191

+NH₂ group

Answer 192

Homocyclic

Answer 193

Heterocyclic

Answer 194

Monocyclic

Answer 195

None of these

Answer 196

Both a and b

Answer 197

Natural gas

Answer 198

It is more stable

Answer 199

The molecule is asymmetrical around C – C bond

Answer 200

It is less stable

Answer 201

The molecule is symmetrical around C – C

Answer 202

Pb is difficult to obtain in bulk qualities

Answer 203

It is costly

Answer 204

It damages the engine

Answer 205

The combustion product, lead causes air pollution

Answer 206

Carbohydrates

Answer 207

None of these

Answer 208

Conformers

Answer 209

Enantiomers

Answer 210

Diastereomers

Answer 211

Positional isomers

Answer 212

CaSO₄. 0.5H₂O

Answer 213

(C₆H₁₀O₅)n

Answer 214

C₆H₁₂O₆

Answer 215

All except SO₃

Answer 216

None of these

Answer 217

Only HF and OF₂

Answer 218

All of these

Answer 219

Prophyl alcohol

Answer 220

Ethyl alcohol

Answer 221

Butyl alcohol

Answer 222

Diethyl pether

Answer 223

Ethyl alcohol

Answer 224

Methyl alcohol

Answer 225

Ethyl hydrogen sulphate

Answer 226

Methyl hydrogen sulphate

Answer 227

Hybridization

Answer 228

Polymerization

Answer 229

Isomerisation

Answer 230

Carbonization

Answer 231

Triangular

Answer 232

Tetrahedral

Answer 233

Square planner

Answer 234

H₂O – tetrahedral

Answer 235

NH₃ - tetrahedral

Answer 236

PF₃ - pyramidal

Answer 237

CF₄ - tetrahedral

Answer 238

None of these

Answer 239

Cyclohexanol

Answer 240

Anthracene

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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