Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Answer

Both bonds are broken

Answer

Sigma bond is broken

Answer

None of these

Answer

Pi bond is broken

Question 2

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

Answer

NH₃ - tetrahedral

Answer

H₂O – tetrahedral

Answer

CF₄ - tetrahedral

Answer

PF₃ - pyramidal

Question 3

3. Which is the solid form of petroleum?

Question 4

4. Which of the following possess linear geometry

Question 5

5. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 6

6. Vital force theory was rejected by

Question 7

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

Answer

Organic compound chain compounds

Answer

They form long chain compounds

Answer

Organic compounds are water soluble

Answer

They exist in homologous series

Question 8

8. The next homologue of C₁₀H₂₂ will be

Answer

C₁₃H₂₈

Answer

C₁₁H₂₄

Answer

C₁₂H₂₆

Answer

C₉H₂₀

Question 9

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

Answer

Reforming process

Answer

Hydrogenation

Question 10

10. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 11

11. Rates of organic reactions are

Answer

None-reactive

Question 12

12. Ethyl alcohol on ____________ gives ethane

Answer

Dehydration

Answer

Dehydrogenation

Question 13

13. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 14

14. Wholer prepared urea from

Question 15

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

Answer

ClO₄¯ - tetrahedral

Answer

ClO₃¯-tetrahedral

Answer

SO₃²¯ - pyramidal

Answer

NO₂¯ - trigonal palnar

Question 16

16. The active part in a molecule is called:

Answer

Ionic complex

Answer

Homologous series

Answer

Chemical bonding

Answer

Functional group

Question 17

17. Ether shows the phenomenon of

Answer

Chain isomerism

Answer

Position isomerism

Answer

Metamerism

Answer

Cis – trass isomerism

Question 18

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

Question 19

19. Petroleum is mainly a mixture of

Answer

Saturated hydrocarbons

Answer

Compounds of S

Answer

Unsaturated hydrocarbon

Question 20

20. Organic compounds are soluble in all except

Question 21

21. The functional group isomer of dimethyl –ether is

Answer

Ethyl alcohol

Answer

Butyl alcohol

Answer

Prophyl alcohol

Answer

Diethyl pether

Question 22

22. Either show the phenomenon of

Answer

Functional group isomerism

Answer

Position isomerism

Answer

Cis-trans isomerism

Answer

Metamerism

Question 23

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

Question 24

24. Which of the following contains single bonds?

Question 25

25. The carbocyclic compounds are those which have

Answer

All atoms are SP³ -hybridized

Answer

May be other atoms

Answer

All atoms are SP² -hybridized

Answer

All atoms in the ring are carbon

Question 26

26. Which is the character of organic compounds

Answer

Mostly ionic in character

Answer

Rates of reactions are very fast

Answer

They possess particular properties

Question 27

27. Normal by product of cracking is

Answer

All of these

Question 28

28. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 29

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

Answer

Ammonium cyanate

Question 30

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

Answer

Hydrogen sulphides

Question 31

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

Question 32

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

Answer

Ethyl hydrogen sulphate

Answer

Ethyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Methyl alcohol

Question 33

33. Hybridization explain the ________ of orbitals

Answer

Type of Bonding

Answer

None of these

Answer

Shape and Type of bonding

Question 34

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

Answer

PH₄⁺ - tetrahedral

Answer

ClO₂ - angular

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

NH₄⁺ - tetrahedral

Question 35

35. In C₂H₂ carbon-carbon bond angle is

Question 36

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

Question 37

37. Which of the following species is planar?

Question 38

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

Answer

Natural gas

Question 39

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

Answer

Tetrahedron

Question 40

40. The components of petroleum can be separated due to

Answer

Having different B.P.

Answer

Having different physical states

Answer

Having different M.P.

Answer

Having different chemical properties

Question 41

41. The essential component of organic compound is

Question 42

42. Straight chain hydrocarbons are

Answer

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

Answer

In which atoms of C are in a series

Answer

None of these

Answer

Not in a series

Question 43

43. 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

Question 44

44. Which of the following has linear shape?

Answer

None of these

Question 45

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

Answer

Para-magnetic

Answer

Un-saturated

Question 46

46. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 47

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

Answer

BF₃ - trigonal planar

Answer

H₂O - bent

Answer

AsF₅ - trigonal bipyramidal

Answer

NF₃ - trigonal planar

Question 48

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

Answer

Ethanoic acid

Question 49

49. Unsaturated hydrocarbons containing a double bond are called

Question 50

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

Answer

Chemical forces

Answer

Carbon forming long chain or rings

Answer

Ionic properties

Question 51

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

Question 52

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

Question 53

53. The number of isomers of C₆H₁₄ is:

Question 54

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

Answer

It is more stable

Answer

The molecule is asymmetrical around C – C bond

Answer

It is less stable

Answer

The molecule is symmetrical around C – C

Question 55

55. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 56

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

Answer

Sugar industry

Answer

Domestic use

Answer

Bake bricks

Answer

In glass industry

Question 57

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

Question 58

58. Coal is obtained from dead remains of

Answer

Both a and b

Question 59

59. An isomer of ethanol is:

Answer

Dimethyl ether

Answer

Diethyl ether

Question 60

60. 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

Catalytic cracking

Answer

Thermal cracking

Answer

Normal cracking

Answer

Stem cracking

Question 61

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

Question 62

62. The major portion of natural oil is

Question 63

63. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 64

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

Answer

None of these

Answer

Heterocyclic

Answer

Monocyclic

Answer

Homocyclic

Answer 117

0¯ bond required less energy to be rotated

Answer 118

0¯ bond is stronger than A-bond

Answer 119

The bond angle is 109.5°

Answer 120

Alkanes possess three groups attached to each carbon

Answer 121

n – Heptane

Answer 122

iso – octane

Answer 123

n – Hexane

Answer 124

Having different physical states

Answer 125

Having different M.P.

Answer 126

Having different B.P.

Answer 127

Having different chemical properties

Answer 128

Alkenes do not undergo addition reactions

Answer 129

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

Answer 130

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

Answer 131

Towards the addition reaction alkenes are more reactive than alkynes

Answer 132

Metamerism

Answer 133

Functional group

Answer 134

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

Answer 135

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

Answer 136

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

Answer 137

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

Answer 138

Chain isomerism

Answer 139

Position isomerism

Answer 140

Metamerism

Answer 141

Functional group isomerism

Answer 142

All except SO₃

Answer 143

Only HF and OF₂

Answer 144

None of these

Answer 145

One p-orbital is involved

Answer 146

One s and 3 p-orbitals are involved

Answer 147

Four p-orbitals are involved

Answer 148

All p-orbitals are involved

Answer 149

(C₆H₁₀O₅)n

Answer 150

CaSO₄. 0.5H₂O

Answer 151

C₆H₁₂O₆

Answer 152

SiO₂+Al₂O₃

Answer 153

Overlap of two p orbitals along their axes

Answer 154

Sidewise overlap of two parallel p orbitals

Answer 155

Overlap of an s and a p orbital

Answer 156

Overlap of two s orbitals

Answer 157

Polymerization

Answer 158

Addition reactions

Answer 159

Condensation reactions

Answer 160

Substitution reactions

Answer 161

Structural

Answer 162

Functional group

Answer 163

Polymerization

Answer 164

Isomerization

Answer 165

Condensation

Answer 166

Antheracite

Answer 167

Vapourization

Answer 168

Crystallization

Answer 169

Enantiomers

Answer 170

Positional isomers

Answer 171

Conformers

Answer 172

Diastereomers

Answer 173

Alkylation

Answer 174

Sulphonation

Answer 175

90° and 180°

Answer 176

90° and 120°

Answer 177

45° and 90°

Answer 178

120° only

Answer 179

C, H, and O only

Answer 180

C and S only

Answer 181

C, H, O and N only

Answer 182

C and H only

Answer 183

Sp-hybridization

Answer 184

Dsp²-hybridization

Answer 185

Sp³-hybridization

Answer 186

Sp²-hybridization

Answer 187

Two sigma and two Pi

Answer 188

One sigma and three Pi

Answer 189

Three sigma and one Pi

Answer 190

-CH₃ group

Answer 191

- OH group

Answer 192

-CHO group

Answer 193

+NH₂ group

Answer 194

It damages the engine

Answer 195

It is costly

Answer 196

Pb is difficult to obtain in bulk qualities

Answer 197

The combustion product, lead causes air pollution

Answer 198

Metamerism

Answer 199

cis – trans isomerism

Answer 200

Functional group isomerism

Answer 201

Position isomerism

Answer 202

Sulphonation

Answer 203

Alkylation

Answer 204

Tetrahedral

Answer 205

Square planer

Answer 206

The same vapour density

Answer 207

The same viscosity

Answer 208

Same molecular weights

Answer 209

Different molecular weights

Answer 210

Anthracite

Answer 211

Methyl hydrogen sulphate

Answer 212

Ethyl alcohol

Answer 213

Methyl alcohol

Answer 214

Ethyl hydrogen sulphate

Answer 215

Isomerisation

Answer 216

Carbonization

Answer 217

Polymerization

Answer 218

Hybridization

Answer 219

Carbohydrates

Answer 220

None of these

Answer 221

Position isomers

Answer 222

Chain isomers

Answer 223

Functional isomers

Answer 224

Anthracene

Answer 225

Cyclohexanol

Answer 226

3 single and 3 double

Answer 227

Of the order 1.5

Answer 228

Single covalent

Answer 229

Double covalent

Answer 230

Square planner

Answer 231

Tetrahedral

Answer 232

Triangular

Answer 233

3 band pair one lone pair

Answer 234

2 band pair 2 lone pair

Answer 235

3 lone pair 1 bond pair

Answer 236

1 band pair 3 lone pair

Answer 237

Hybrid orbitals

Answer 238

Hybrid and un hybrid orbitals

Answer 239

Atomic orbital and hybrid orbital

Answer 240

Un-hybrid orbitals

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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