Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 2

2. Normal by product of cracking is

Answer

All of these

Question 3

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

Answer

Sp-hybridization

Answer

Sp²-hybridization

Answer

Dsp²-hybridization

Answer

Sp³-hybridization

Question 4

4. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 5

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

Answer

Sugar industry

Answer

Bake bricks

Answer

In glass industry

Answer

Domestic use

Question 6

6. The components of petroleum can be separated due to

Answer

Having different M.P.

Answer

Having different chemical properties

Answer

Having different physical states

Answer

Having different B.P.

Question 7

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

Question 8

8. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 9

9. Petroleum is mainly a mixture of

Answer

Compounds of S

Answer

Unsaturated hydrocarbon

Answer

Saturated hydrocarbons

Question 10

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

Question 11

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

Question 12

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

Question 13

13. The number of isomers of C₆H₁₄ is:

Question 14

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

Answer

Ethanoic acid

Question 15

15. Methane is produced when aluminum carbide is treated with

Question 16

16. Which of the following contains single bonds?

Question 17

17. The structure of benzene is

Answer

Tetrahedral

Answer

Square planer

Question 18

18. The major portion of natural oil is

Question 19

19. The demand of gasoline can be fulfilled by

Answer

Vapourization

Answer

Crystallization

Question 20

20. The active part in a molecule is called:

Answer

Functional group

Answer

Ionic complex

Answer

Chemical bonding

Answer

Homologous series

Question 21

21. Hydrocarbons contain

Answer

C, H, O and N only

Answer

C, H, and O only

Answer

C and S only

Answer

C and H only

Question 22

22. The next homologue of C₁₀H₂₂ will be

Answer

C₉H₂₀

Answer

C₁₂H₂₆

Answer

C₁₁H₂₄

Answer

C₁₃H₂₈

Question 23

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

Answer

Position isomerism

Answer

Chain isomerism

Answer

Metamerism

Answer

Functional group isomerism

Question 24

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

Question 25

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

Answer

Ammonium cyanate

Question 26

26. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 27

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

Answer

Same molecular weights

Answer

Different molecular weights

Answer

The same vapour density

Answer

The same viscosity

Question 28

28. The octane number is 100 for

Answer

Neo-octane

Answer

Neo-Pentane

Question 29

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

Answer

All except SO₃

Answer

Only HF and OF₂

Answer

None of these

Question 30

30. Which of the following species is planar?

Question 31

31. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 32

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

Question 33

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

Answer

90° and 180°

Answer

45° and 90°

Answer

90° and 120°

Answer

120° only

Question 34

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

Answer

Alkylation

Answer

Sulphonation

Question 35

35. Wholer prepared urea from

Question 36

36. The state of hybridization carbon in ethane is

Question 37

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

Answer

H₂O – tetrahedral

Answer

PF₃ - pyramidal

Answer

CF₄ - tetrahedral

Answer

NH₃ - tetrahedral

Question 38

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

Answer

Pi bond is broken

Answer

Sigma bond is broken

Answer

None of these

Answer

Both bonds are broken

Question 39

39. Which is the character of organic compounds

Answer

Rates of reactions are very fast

Answer

Mostly ionic in character

Answer

They possess particular properties

Question 40

40. 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

One sigma and three Pi

Answer

Three sigma and one Pi

Question 41

41. In benzene carbon – carbon bonds are

Answer

Single covalent

Answer

3 single and 3 double

Answer

Of the order 1.5

Answer

Double covalent

Question 42

42. Which of the following is complex?

Answer

(C₆H₁₀O₅)n

Answer

C₆H₁₂O₆

Answer

CaSO₄. 0.5H₂O

Question 43

43. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Square planner

Answer

Tetrahedral

Answer

Triangular

Question 44

44. Vital force theory was rejected by

Question 45

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

Question 46

46. The characteristic reactions of alkanes are

Answer

Polymerization

Answer

Condensation reactions

Answer

Substitution reactions

Answer

Addition reactions

Question 47

47. The functional group isomer of dimethyl –ether is

Answer

Prophyl alcohol

Answer

Ethyl alcohol

Answer

Butyl alcohol

Answer

Diethyl pether

Question 48

48. 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

Stem cracking

Answer

Normal cracking

Answer

Thermal cracking

Question 49

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

Answer

Sulphonation

Answer

Alkylation

Question 50

50. The carbocyclic compounds are those which have

Answer

All atoms in the ring are carbon

Answer

All atoms are SP³ -hybridized

Answer

May be other atoms

Answer

All atoms are SP² -hybridized

Question 51

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

Answer

AsF₅ - trigonal bipyramidal

Answer

H₂O - bent

Answer

NF₃ - trigonal planar

Answer

BF₃ - trigonal planar

Question 52

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

Answer

Chemical forces

Answer

Ionic properties

Answer

Carbon forming long chain or rings

Question 53

53. 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 54

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

Question 55

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

Answer

The combustion product, lead causes air pollution

Answer

Pb is difficult to obtain in bulk qualities

Answer

It is costly

Answer

It damages the engine

Question 56

56. In C₂H₂ carbon-carbon bond angle is

Question 57

57. Unsaturated hydrocarbons containing a double bond are called

Question 58

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

Answer

ClO₂ - angular

Answer

NH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

PH₄⁺ - tetrahedral

Question 59

59. The essential component of organic compound is

Question 60

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

Question 61

61. Hybridization explain the ________ of orbitals

Answer

Type of Bonding

Answer

None of these

Answer

Shape and Type of bonding

Question 62

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

Question 63

63. Rates of organic reactions are

Answer

None-reactive

Question 64

64. Isomerism which is only found in alkanes?

Answer

Metamerism

Answer

Functional group isomerism

Answer

Position isomerism

Answer

cis – trans isomerism

Answer 125

Functional isomers

Answer 126

Chain isomers

Answer 127

Position isomers

Answer 128

Both a and b

Answer 129

Catenation

Answer 130

None of these

Answer 131

One p-orbital is involved

Answer 132

Four p-orbitals are involved

Answer 133

One s and 3 p-orbitals are involved

Answer 134

All p-orbitals are involved

Answer 135

Functional group

Answer 136

Metamerism

Answer 137

Para-magnetic

Answer 138

Un-saturated

Answer 139

Structural

Answer 140

Functional group

Answer 141

Hydrogenation

Answer 142

Reforming process

Answer 143

Polymerization

Answer 144

Condensation

Answer 145

Isomerization

Answer 146

Organic compound chain compounds

Answer 147

They exist in homologous series

Answer 148

Organic compounds are water soluble

Answer 149

They form long chain compounds

Answer 150

Natural gas

Answer 151

-CH₃ group

Answer 152

+NH₂ group

Answer 153

-CHO group

Answer 154

- OH group

Answer 155

Antheracite

Answer 156

Cyclohexanol

Answer 157

Anthracene

Answer 158

Overlap of two s orbitals

Answer 159

Overlap of two p orbitals along their axes

Answer 160

Overlap of an s and a p orbital

Answer 161

Sidewise overlap of two parallel p orbitals

Answer 162

Metamerism

Answer 163

Cis-trans isomerism

Answer 164

Functional group isomerism

Answer 165

Position isomerism

Answer 166

Ethyl hydrogen sulphate

Answer 167

Methyl alcohol

Answer 168

Ethyl alcohol

Answer 169

Methyl hydrogen sulphate

Answer 170

Position isomerism

Answer 171

Metamerism

Answer 172

Cis – trass isomerism

Answer 173

Chain isomerism

Answer 174

Dimethyl ether

Answer 175

Diethyl ether

Answer 176

Isomerisation

Answer 177

Carbonization

Answer 178

Polymerization

Answer 179

Hybridization

Answer 180

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

Answer 181

In which atoms of C are in a series

Answer 182

Not in a series

Answer 183

None of these

Answer 184

None of these

Answer 185

The molecule is asymmetrical around C – C bond

Answer 186

The molecule is symmetrical around C – C

Answer 187

It is more stable

Answer 188

It is less stable

Answer 189

Having different M.P.

Answer 190

Having different physical states

Answer 191

Having different B.P.

Answer 192

Having different chemical properties

Answer 193

Diastereomers

Answer 194

Enantiomers

Answer 195

Conformers

Answer 196

Positional isomers

Answer 197

iso – octane

Answer 198

n – Hexane

Answer 199

n – Heptane

Answer 200

Linear compounds

Answer 201

Both A and B

Answer 202

Tetrahedron

Answer 203

3 lone pair 1 bond pair

Answer 204

2 band pair 2 lone pair

Answer 205

1 band pair 3 lone pair

Answer 206

3 band pair one lone pair

Answer 207

SO₃²¯ - pyramidal

Answer 208

ClO₃¯-tetrahedral

Answer 209

NO₂¯ - trigonal palnar

Answer 210

ClO₄¯ - tetrahedral

Answer 211

Natural gas

Answer 212

Dehydration

Answer 213

Dehydrogenation

Answer 214

Carbohydrates

Answer 215

None of these

Answer 216

Methyl alcohol

Answer 217

Ethyl hydrogen sulphate

Answer 218

Ethyl alcohol

Answer 219

Methyl hydrogen sulphate

Answer 220

0¯ bond is stronger than A-bond

Answer 221

Alkanes possess three groups attached to each carbon

Answer 222

The bond angle is 109.5°

Answer 223

0¯ bond required less energy to be rotated

Answer 224

Atomic orbital and hybrid orbital

Answer 225

Hybrid and un hybrid orbitals

Answer 226

Hybrid orbitals

Answer 227

Un-hybrid orbitals

Answer 228

Hydrogen sulphides

Answer 229

Alkenes do not undergo addition reactions

Answer 230

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

Answer 231

Towards the addition reaction alkenes are more reactive than alkynes

Answer 232

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

Answer 233

Heterocyclic

Answer 234

Homocyclic

Answer 235

Monocyclic

Answer 236

None of these

Answer 237

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

Answer 238

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

Answer 239

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

Answer 240

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

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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