Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. 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 2

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

Question 3

3. Vital force theory was rejected by

Question 4

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

Answer

120° only

Answer

90° and 120°

Answer

90° and 180°

Answer

45° and 90°

Question 5

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

Question 6

6. The active part in a molecule is called:

Answer

Chemical bonding

Answer

Ionic complex

Answer

Homologous series

Answer

Functional group

Question 7

7. Hybridization explain the ________ of orbitals

Answer

None of these

Answer

Shape and Type of bonding

Answer

Type of Bonding

Question 8

8. The next homologue of C₁₀H₂₂ will be

Answer

C₁₃H₂₈

Answer

C₁₂H₂₆

Answer

C₉H₂₀

Answer

C₁₁H₂₄

Question 9

9. The essential component of organic compound is

Question 10

10. 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 11

11. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 12

12. Polythene is a polymer of

Question 13

13. Which of the following possess linear geometry

Question 14

14. Which molecule is nonpolar?

Question 15

15. The demand of gasoline can be fulfilled by

Answer

Crystallization

Answer

Vapourization

Question 16

16. Either show the phenomenon of

Answer

Functional group isomerism

Answer

Cis-trans isomerism

Answer

Metamerism

Answer

Position isomerism

Question 17

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

Answer

They exist in homologous series

Answer

Organic compound chain compounds

Answer

Organic compounds are water soluble

Answer

They form long chain compounds

Question 18

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

Answer

Chemical forces

Answer

Ionic properties

Answer

Carbon forming long chain or rings

Question 19

19. 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

Stem cracking

Answer

Normal cracking

Question 20

20. Acetylene had a characteristic ethereal smell resembling that of

Question 21

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

Answer

All except SO₃

Answer

None of these

Answer

Only HF and OF₂

Question 22

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

Answer

Reforming process

Answer

Hydrogenation

Question 23

23. Which of the following contains single bonds?

Question 24

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

Answer

Methyl hydrogen sulphate

Answer

Ethyl hydrogen sulphate

Answer

Ethyl alcohol

Answer

Methyl alcohol

Question 25

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

Answer

Domestic use

Answer

Bake bricks

Answer

Sugar industry

Answer

In glass industry

Question 26

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

Answer

Ammonium cyanate

Question 27

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

Question 28

28. The state of hybridization carbon in ethane is

Question 29

29. C₂H₂Cl₂ can show isomerism

Answer

Metamerism

Answer

Functional group

Question 30

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

Question 31

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

Question 32

32. Which of the following has linear shape?

Answer

None of these

Question 33

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

Question 34

34. Which is the solid form of petroleum?

Question 35

35. Which of the following is complex?

Answer

(C₆H₁₀O₅)n

Answer

CaSO₄. 0.5H₂O

Answer

C₆H₁₂O₆

Question 36

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

Question 37

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

Answer

Alkylation

Answer

Sulphonation

Question 38

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

Answer

Tetrahedron

Question 39

39. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 40

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

Answer

Polymerization

Answer

Isomerization

Answer

Condensation

Question 41

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

Answer

-CHO group

Answer

+NH₂ group

Answer

-CH₃ group

Answer

- OH group

Question 42

42. In C₂H₂ carbon-carbon bond angle is

Question 43

43. The carbocyclic compounds are those which have

Answer

All atoms are SP³ -hybridized

Answer

May be other atoms

Answer

All atoms in the ring are carbon

Answer

All atoms are SP² -hybridized

Question 44

44. Straight chain hydrocarbons are

Answer

In which atoms of C are in a series

Answer

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

Answer

None of these

Answer

Not in a series

Question 45

45. Isomerism which is only found in alkanes?

Answer

Metamerism

Answer

Position isomerism

Answer

Functional group isomerism

Answer

cis – trans isomerism

Question 46

46. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 47

47. Normal by product of cracking is

Answer

All of these

Question 48

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

Question 49

49. Coal is obtained from dead remains of

Answer

Both a and b

Question 50

50. Hydrocarbons contain

Answer

C and S only

Answer

C, H, O and N only

Answer

C and H only

Answer

C, H, and O only

Question 51

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

Answer

Ethanoic acid

Question 52

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

Answer

Same molecular weights

Answer

The same vapour density

Answer

Different molecular weights

Answer

The same viscosity

Question 53

53. The components of petroleum can be separated due to

Answer

Having different physical states

Answer

Having different B.P.

Answer

Having different chemical properties

Answer

Having different M.P.

Question 54

54. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 55

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

Question 56

56. Which one is not an organic compound

Answer

Carbohydrates

Answer

None of these

Question 57

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

Question 58

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

Answer

Antheracite

Question 59

59. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 60

60. 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 61

61. Wholer prepared urea from

Question 62

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

Question 63

63. Which one has zero octane number?

Answer

n – Hexane

Answer

n – Heptane

Answer

iso – octane

Question 64

64. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Answer 111

Methyl hydrogen sulphate

Answer 112

Methyl alcohol

Answer 113

Ethyl hydrogen sulphate

Answer 114

Ethyl alcohol

Answer 115

ClO₃¯-tetrahedral

Answer 116

ClO₄¯ - tetrahedral

Answer 117

NO₂¯ - trigonal palnar

Answer 118

SO₃²¯ - pyramidal

Answer 119

ClO₂ - angular

Answer 120

PH₄⁺ - tetrahedral

Answer 121

SiCl₆²¯ -trigonal bipyramidal

Answer 122

NH₄⁺ - tetrahedral

Answer 123

Anthracene

Answer 124

Cyclohexanol

Answer 125

CF₄ - tetrahedral

Answer 126

PF₃ - pyramidal

Answer 127

H₂O – tetrahedral

Answer 128

NH₃ - tetrahedral

Answer 129

The bond angle is 109.5°

Answer 130

0¯ bond required less energy to be rotated

Answer 131

0¯ bond is stronger than A-bond

Answer 132

Alkanes possess three groups attached to each carbon

Answer 133

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

Answer 134

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

Answer 135

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

Answer 136

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

Answer 137

Having different B.P.

Answer 138

Having different M.P.

Answer 139

Having different physical states

Answer 140

Having different chemical properties

Answer 141

Four p-orbitals are involved

Answer 142

One s and 3 p-orbitals are involved

Answer 143

All p-orbitals are involved

Answer 144

One p-orbital is involved

Answer 145

Alkylation

Answer 146

Sulphonation

Answer 147

Diastereomers

Answer 148

Enantiomers

Answer 149

Positional isomers

Answer 150

Conformers

Answer 151

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

Answer 152

Alkenes do not undergo addition reactions

Answer 153

Towards the addition reaction alkenes are more reactive than alkynes

Answer 154

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

Answer 155

Hydrogen sulphides

Answer 156

None of these

Answer 157

Heterocyclic

Answer 158

Monocyclic

Answer 159

Homocyclic

Answer 160

Structural

Answer 161

Functional group

Answer 162

Dsp²-hybridization

Answer 163

Sp-hybridization

Answer 164

Sp³-hybridization

Answer 165

Sp²-hybridization

Answer 166

Chain isomerism

Answer 167

Functional group isomerism

Answer 168

Metamerism

Answer 169

Position isomerism

Answer 170

Tetrahedral

Answer 171

Square planner

Answer 172

Triangular

Answer 173

Anthracite

Answer 174

Isomerisation

Answer 175

Polymerization

Answer 176

Carbonization

Answer 177

Hybridization

Answer 178

Addition reactions

Answer 179

Polymerization

Answer 180

Condensation reactions

Answer 181

Substitution reactions

Answer 182

2 band pair 2 lone pair

Answer 183

3 lone pair 1 bond pair

Answer 184

1 band pair 3 lone pair

Answer 185

3 band pair one lone pair

Answer 186

It damages the engine

Answer 187

It is costly

Answer 188

Pb is difficult to obtain in bulk qualities

Answer 189

The combustion product, lead causes air pollution

Answer 190

Natural gas

Answer 191

Single covalent

Answer 192

3 single and 3 double

Answer 193

Of the order 1.5

Answer 194

Double covalent

Answer 195

Prophyl alcohol

Answer 196

Butyl alcohol

Answer 197

Diethyl pether

Answer 198

Ethyl alcohol

Answer 199

Hybrid orbitals

Answer 200

Un-hybrid orbitals

Answer 201

Atomic orbital and hybrid orbital

Answer 202

Hybrid and un hybrid orbitals

Answer 203

Sidewise overlap of two parallel p orbitals

Answer 204

Overlap of two s orbitals

Answer 205

Overlap of an s and a p orbital

Answer 206

Overlap of two p orbitals along their axes

Answer 207

Chain isomers

Answer 208

Functional isomers

Answer 209

Position isomers

Answer 210

Unsaturated hydrocarbon

Answer 211

Saturated hydrocarbons

Answer 212

Compounds of S

Answer 213

BF₃ - trigonal planar

Answer 214

AsF₅ - trigonal bipyramidal

Answer 215

NF₃ - trigonal planar

Answer 216

H₂O - bent

Answer 217

Pi bond is broken

Answer 218

None of these

Answer 219

Sigma bond is broken

Answer 220

Both bonds are broken

Answer 221

Dehydrogenation

Answer 222

Dehydration

Answer 223

None-reactive

Answer 224

Square planer

Answer 225

Tetrahedral

Answer 226

Both A and B

Answer 227

Linear compounds

Answer 228

Natural gas

Answer 229

Un-saturated

Answer 230

Para-magnetic

Answer 231

The molecule is symmetrical around C – C

Answer 232

It is less stable

Answer 233

It is more stable

Answer 234

The molecule is asymmetrical around C – C bond

Answer 235

Neo-octane

Answer 236

Neo-Pentane

Answer 237

Cis – trass isomerism

Answer 238

Position isomerism

Answer 239

Chain isomerism

Answer 240

Metamerism

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