Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Answer

Sugar industry

Answer

In glass industry

Answer

Domestic use

Answer

Bake bricks

Question 2

2. The essential component of organic compound is

Question 3

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

Answer

Natural gas

Question 4

4. In benzene carbon – carbon bonds are

Answer

Single covalent

Answer

Double covalent

Answer

Of the order 1.5

Answer

3 single and 3 double

Question 5

5. Straight chain hydrocarbons are

Answer

Not in a series

Answer

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

Answer

None of these

Answer

In which atoms of C are in a series

Question 6

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

Answer

Sp³-hybridization

Answer

Sp-hybridization

Answer

Sp²-hybridization

Answer

Dsp²-hybridization

Question 7

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

Answer

Alkylation

Answer

Sulphonation

Question 8

8. The major portion of natural oil is

Question 9

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

Question 10

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

Answer

Enantiomers

Answer

Positional isomers

Answer

Diastereomers

Answer

Conformers

Question 11

11. Coal is obtained from dead remains of

Answer

Both a and b

Question 12

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

Answer

It damages the engine

Answer

It is costly

Answer

Pb is difficult to obtain in bulk qualities

Answer

The combustion product, lead causes air pollution

Question 13

13. C₄H₈ can show isomerism

Answer

Structural

Answer

Functional group

Question 14

14. Which one has zero octane number?

Answer

n – Heptane

Answer

iso – octane

Answer

n – Hexane

Question 15

15. Vital force theory was rejected by

Question 16

16. Isomerism which is only found in alkanes?

Answer

Position isomerism

Answer

cis – trans isomerism

Answer

Metamerism

Answer

Functional group isomerism

Question 17

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

Answer

Antheracite

Question 18

18. Which of the following contains single bonds?

Question 19

19. The characteristic reactions of alkanes are

Answer

Condensation reactions

Answer

Polymerization

Answer

Substitution reactions

Answer

Addition reactions

Question 20

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

Question 21

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

Answer

Sigma bond is broken

Answer

Both bonds are broken

Answer

None of these

Answer

Pi bond is broken

Question 22

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

Answer

Un-saturated

Answer

Para-magnetic

Question 23

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

Answer

Reforming process

Answer

Hydrogenation

Question 24

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

Answer

- OH group

Answer

-CH₃ group

Answer

-CHO group

Answer

+NH₂ group

Question 25

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

Answer

Organic compounds are water soluble

Answer

They exist in homologous series

Answer

They form long chain compounds

Answer

Organic compound chain compounds

Question 26

26. The next homologue of C₁₀H₂₂ will be

Answer

C₁₁H₂₄

Answer

C₉H₂₀

Answer

C₁₃H₂₈

Answer

C₁₂H₂₆

Question 27

27. C₂H₂Cl₂ can show isomerism

Answer

Metamerism

Answer

Functional group

Question 28

28. Hydrocarbons contain

Answer

C and S only

Answer

C, H, and O only

Answer

C, H, O and N only

Answer

C and H only

Question 29

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

Answer

120° only

Answer

45° and 90°

Answer

90° and 120°

Answer

90° and 180°

Question 30

30. The demand of gasoline can be fulfilled by

Answer

Vapourization

Answer

Crystallization

Question 31

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

Answer

Ammonium cyanate

Question 32

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

Question 33

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

Question 34

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

Answer

ClO₃¯-tetrahedral

Answer

ClO₄¯ - tetrahedral

Answer

NO₂¯ - trigonal palnar

Answer

SO₃²¯ - pyramidal

Question 35

35. 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

Normal cracking

Answer

Thermal cracking

Answer

Stem cracking

Answer

Catalytic cracking

Question 36

36. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 37

37. Acetylene had a characteristic ethereal smell resembling that of

Question 38

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

Answer

PF₃ - pyramidal

Answer

H₂O – tetrahedral

Answer

CF₄ - tetrahedral

Answer

NH₃ - tetrahedral

Question 39

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

Answer

Hybridization

Answer

Isomerisation

Answer

Carbonization

Answer

Polymerization

Question 40

40. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 41

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

Answer

Chemical forces

Answer

Ionic properties

Answer

Carbon forming long chain or rings

Question 42

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

Question 43

43. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 44

44. Which of the following is complex?

Answer

(C₆H₁₀O₅)n

Answer

C₆H₁₂O₆

Answer

CaSO₄. 0.5H₂O

Question 45

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

Question 46

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

Question 47

47. Alkanes cannot show cis-trans isomerism

Answer

0¯ bond is stronger than A-bond

Answer

The bond angle is 109.5°

Answer

Alkanes possess three groups attached to each carbon

Answer

0¯ bond required less energy to be rotated

Question 48

48. Methane is produced when aluminum carbide is treated with

Question 49

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

Question 50

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

Question 51

51. Bromoethane can be converted to ethane by

Answer

Reaction with alcoholic KOH

Answer

Reaction with aq KOH

Question 52

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

Question 53

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

Answer

ClO₂ - angular

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

NH₄⁺ - tetrahedral

Answer

PH₄⁺ - tetrahedral

Question 54

54. Rates of organic reactions are

Answer

None-reactive

Question 55

55. In C₂H₂ carbon-carbon bond angle is

Question 56

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

Answer

Cyclohexanol

Answer

Anthracene

Question 57

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

Answer

1 band pair 3 lone pair

Answer

2 band pair 2 lone pair

Answer

3 band pair one lone pair

Answer

3 lone pair 1 bond pair

Question 58

58. Organic compounds are soluble in all except

Question 59

59. Which molecule is nonpolar?

Question 60

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

Question 61

61. Which of the following possess linear geometry

Question 62

62. Hybridization explain the ________ of orbitals

Answer

None of these

Answer

Shape and Type of bonding

Answer

Type of Bonding

Question 63

63. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 64

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

Answer 124

Having different M.P.

Answer 125

Having different physical states

Answer 126

Having different chemical properties

Answer 127

Having different B.P.

Answer 128

They possess particular properties

Answer 129

Mostly ionic in character

Answer 130

Rates of reactions are very fast

Answer 131

H₂O - bent

Answer 132

NF₃ - trigonal planar

Answer 133

AsF₅ - trigonal bipyramidal

Answer 134

BF₃ - trigonal planar

Answer 135

Saturated hydrocarbons

Answer 136

Compounds of S

Answer 137

Unsaturated hydrocarbon

Answer 138

Cis – trass isomerism

Answer 139

Position isomerism

Answer 140

Metamerism

Answer 141

Chain isomerism

Answer 142

Position isomerism

Answer 143

Metamerism

Answer 144

Functional group isomerism

Answer 145

Cis-trans isomerism

Answer 146

Tetrahedron

Answer 147

All of these

Answer 148

Position isomers

Answer 149

Functional isomers

Answer 150

Chain isomers

Answer 151

None of these

Answer 152

Carbohydrates

Answer 153

SiO₂+Al₂O₃

Answer 154

All atoms are SP³ -hybridized

Answer 155

May be other atoms

Answer 156

All atoms are SP² -hybridized

Answer 157

All atoms in the ring are carbon

Answer 158

Triangular

Answer 159

Square planner

Answer 160

Tetrahedral

Answer 161

Polymerization

Answer 162

Isomerization

Answer 163

Condensation

Answer 164

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

Answer 165

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

Answer 166

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

Answer 167

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

Answer 168

Three sigma and one Pi

Answer 169

One sigma and three Pi

Answer 170

Two sigma and two Pi

Answer 171

Butyl alcohol

Answer 172

Ethyl alcohol

Answer 173

Diethyl pether

Answer 174

Prophyl alcohol

Answer 175

Linear compounds

Answer 176

Both A and B

Answer 177

Ethanoic acid

Answer 178

Only HF and OF₂

Answer 179

All except SO₃

Answer 180

None of these

Answer 181

None of these

Answer 182

Towards the addition reaction alkenes are more reactive than alkynes

Answer 183

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

Answer 184

Alkenes do not undergo addition reactions

Answer 185

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

Answer 186

Diethyl ether

Answer 187

Dimethyl ether

Answer 188

Dehydrogenation

Answer 189

Dehydration

Answer 190

Overlap of two s orbitals

Answer 191

Overlap of an s and a p orbital

Answer 192

Sidewise overlap of two parallel p orbitals

Answer 193

Overlap of two p orbitals along their axes

Answer 194

Homologous series

Answer 195

Chemical bonding

Answer 196

Functional group

Answer 197

Ionic complex

Answer 198

Ethyl alcohol

Answer 199

Ethyl hydrogen sulphate

Answer 200

Methyl hydrogen sulphate

Answer 201

Methyl alcohol

Answer 202

Alkylation

Answer 203

Sulphonation

Answer 204

Monocyclic

Answer 205

Homocyclic

Answer 206

None of these

Answer 207

Heterocyclic

Answer 208

Position isomerism

Answer 209

Chain isomerism

Answer 210

Functional group isomerism

Answer 211

Metamerism

Answer 212

The molecule is asymmetrical around C – C bond

Answer 213

It is more stable

Answer 214

The molecule is symmetrical around C – C

Answer 215

It is less stable

Answer 216

Having different chemical properties

Answer 217

Having different B.P.

Answer 218

Having different physical states

Answer 219

Having different M.P.

Answer 220

Catenation

Answer 221

None of these

Answer 222

Hybrid orbitals

Answer 223

Atomic orbital and hybrid orbital

Answer 224

Un-hybrid orbitals

Answer 225

Hybrid and un hybrid orbitals

Answer 226

None of these

Answer 227

Hydrogen sulphides

Answer 228

Methyl alcohol

Answer 229

Ethyl alcohol

Answer 230

Ethyl hydrogen sulphate

Answer 231

Methyl hydrogen sulphate

Answer 232

Different molecular weights

Answer 233

Same molecular weights

Answer 234

The same viscosity

Answer 235

The same vapour density

Answer 236

All p-orbitals are involved

Answer 237

One s and 3 p-orbitals are involved

Answer 238

One p-orbital is involved

Answer 239

Four p-orbitals are involved

Answer 240

Anthracite

Total Questions:	119
Time Allowed:	60 Minutes
Total Marks:	119
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