Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Question 2

2. Vital force theory was rejected by

Question 3

3. Which molecule is nonpolar?

Question 4

4. On passing ethane into concentrated sulphuric acid, the intermediate compound formed on hydrolysis with boiling water gives:

Answer

Methyl hydrogen sulphate

Answer

Ethyl alcohol

Answer

Ethyl hydrogen sulphate

Answer

Methyl alcohol

Question 5

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

Answer

Homocyclic

Answer

None of these

Answer

Heterocyclic

Answer

Monocyclic

Question 6

6. Ethyl alcohol on ____________ gives ethane

Answer

Dehydration

Answer

Dehydrogenation

Question 7

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

Answer

Enantiomers

Answer

Positional isomers

Answer

Diastereomers

Answer

Conformers

Question 8

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

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. Which statement is true regarding reactivity?

Answer

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

Answer

Alkenes do not undergo addition reactions

Answer

Towards the addition reaction alkenes are more reactive than alkynes

Answer

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

Question 11

11. Wholer prepared urea from

Question 12

12. Ether shows the phenomenon of

Answer

Metamerism

Answer

Chain isomerism

Answer

Cis – trass isomerism

Answer

Position isomerism

Question 13

13. The active part in a molecule is called:

Answer

Functional group

Answer

Chemical bonding

Answer

Ionic complex

Answer

Homologous series

Question 14

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

Question 15

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

Question 16

16. In benzene carbon – carbon bonds are

Answer

Double covalent

Answer

Of the order 1.5

Answer

Single covalent

Answer

3 single and 3 double

Question 17

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

Question 18

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

Question 19

19. Which of the following contains single bonds?

Question 20

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

Answer

NH₃ - tetrahedral

Answer

CF₄ - tetrahedral

Answer

PF₃ - pyramidal

Answer

H₂O – tetrahedral

Question 21

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

Answer

Position isomerism

Answer

Functional group isomerism

Answer

Chain isomerism

Answer

Metamerism

Question 22

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

Question 23

23. The self-linking of carbon atoms is called

Answer

Catenation

Answer

None of these

Question 24

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

Answer

In glass industry

Answer

Bake bricks

Answer

Sugar industry

Answer

Domestic use

Question 25

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

Answer

1 band pair 3 lone pair

Answer

3 band pair one lone pair

Answer

3 lone pair 1 bond pair

Answer

2 band pair 2 lone pair

Question 26

26. Unsaturated hydrocarbons containing a double bond are called

Question 27

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

Answer

Organic compound chain compounds

Answer

They exist in homologous series

Answer

Organic compounds are water soluble

Answer

They form long chain compounds

Question 28

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

Answer

Carbon forming long chain or rings

Answer

Chemical forces

Answer

Ionic properties

Question 29

29. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 30

30. The open chain organic compounds are called

Answer

Linear compounds

Answer

Both A and B

Question 31

31. Which one has zero octane number?

Answer

n – Heptane

Answer

n – Hexane

Answer

iso – octane

Question 32

32. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 33

33. Rates of organic reactions are

Answer

None-reactive

Question 34

34. The components of petroleum can be separated due to

Answer

Having different physical states

Answer

Having different B.P.

Answer

Having different M.P.

Answer

Having different chemical properties

Question 35

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

Answer

SO₃²¯ - pyramidal

Answer

ClO₄¯ - tetrahedral

Answer

NO₂¯ - trigonal palnar

Answer

ClO₃¯-tetrahedral

Question 36

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

Answer

PH₄⁺ - tetrahedral

Answer

NH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

ClO₂ - angular

Question 37

37. The functional group isomer of dimethyl –ether is

Answer

Diethyl pether

Answer

Ethyl alcohol

Answer

Prophyl alcohol

Answer

Butyl alcohol

Question 38

38. The essential component of organic compound is

Question 39

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

Question 40

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

Answer

The molecule is asymmetrical around C – C bond

Answer

It is less stable

Answer

It is more stable

Answer

The molecule is symmetrical around C – C

Question 41

41. The components of petroleum can be separated due to

Answer

Having different M.P.

Answer

Having different B.P.

Answer

Having different chemical properties

Answer

Having different physical states

Question 42

42. 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

Stem cracking

Answer

Thermal cracking

Answer

Catalytic cracking

Question 43

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

Question 44

44. Acetylene had a characteristic ethereal smell resembling that of

Question 45

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

Answer

Natural gas

Question 46

46. Normal by product of cracking is

Answer

All of these

Question 47

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

Question 48

48. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 49

49. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 50

50. The demand of gasoline can be fulfilled by

Answer

Crystallization

Answer

Vapourization

Question 51

51. The state of hybridization carbon in ethane is

Question 52

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

Question 53

53. Bromoethane can be converted to ethane by

Answer

Reaction with alcoholic KOH

Answer

Reaction with aq KOH

Question 54

54. Which is the solid form of petroleum?

Question 55

55. The number of isomers of C₆H₁₄ is:

Question 56

56. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 57

57. The characteristic reactions of alkanes are

Answer

Condensation reactions

Answer

Polymerization

Answer

Substitution reactions

Answer

Addition reactions

Question 58

58. Hybridization explain the ________ of orbitals

Answer

Type of Bonding

Answer

Shape and Type of bonding

Answer

None of these

Question 59

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

Answer

None of these

Answer

All except SO₃

Answer

Only HF and OF₂

Question 60

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

Question 61

61. The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

Answer

Position isomers

Answer

Functional isomers

Answer

Chain isomers

Question 62

62. 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

Three sigma and one Pi

Answer

Two sigma and two Pi

Answer

One sigma and three Pi

Question 63

63. 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

It damages the engine

Answer

Pb is difficult to obtain in bulk qualities

Answer

It is costly

Question 64

64. 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

Answer 129

Metamerism

Answer 130

Functional group

Answer 131

Sulphonation

Answer 132

Alkylation

Answer 133

Position isomerism

Answer 134

Metamerism

Answer 135

cis – trans isomerism

Answer 136

Functional group isomerism

Answer 137

Sp³-hybridization

Answer 138

Sp-hybridization

Answer 139

Sp²-hybridization

Answer 140

Dsp²-hybridization

Answer 141

Square planner

Answer 142

Triangular

Answer 143

Tetrahedral

Answer 144

Hydrogenation

Answer 145

Reforming process

Answer 146

Mostly ionic in character

Answer 147

They possess particular properties

Answer 148

Rates of reactions are very fast

Answer 149

None of these

Answer 150

Carbohydrates

Answer 151

Un-hybrid orbitals

Answer 152

Hybrid orbitals

Answer 153

Hybrid and un hybrid orbitals

Answer 154

Atomic orbital and hybrid orbital

Answer 155

SiO₂+Al₂O₃

Answer 156

Ammonium cyanate

Answer 157

The same viscosity

Answer 158

Same molecular weights

Answer 159

The same vapour density

Answer 160

Different molecular weights

Answer 161

Sigma bond is broken

Answer 162

None of these

Answer 163

Pi bond is broken

Answer 164

Both bonds are broken

Answer 165

None of these

Answer 166

C, H, O and N only

Answer 167

C and S only

Answer 168

C, H, and O only

Answer 169

C and H only

Answer 170

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

Answer 171

In which atoms of C are in a series

Answer 172

None of these

Answer 173

Not in a series

Answer 174

The bond angle is 109.5°

Answer 175

Alkanes possess three groups attached to each carbon

Answer 176

0¯ bond is stronger than A-bond

Answer 177

0¯ bond required less energy to be rotated

Answer 178

Both a and b

Answer 179

Sulphonation

Answer 180

Alkylation

Answer 181

Unsaturated hydrocarbon

Answer 182

Compounds of S

Answer 183

Saturated hydrocarbons

Answer 184

C₁₁H₂₄

Answer 185

C₁₂H₂₆

Answer 186

C₁₃H₂₈

Answer 187

C₉H₂₀

Answer 188

120° only

Answer 189

90° and 180°

Answer 190

45° and 90°

Answer 191

90° and 120°

Answer 192

NF₃ - trigonal planar

Answer 193

BF₃ - trigonal planar

Answer 194

AsF₅ - trigonal bipyramidal

Answer 195

H₂O - bent

Answer 196

Position isomerism

Answer 197

Metamerism

Answer 198

Cis-trans isomerism

Answer 199

Functional group isomerism

Answer 200

Polymerization

Answer 201

Condensation

Answer 202

Isomerization

Answer 203

Overlap of an s and a p orbital

Answer 204

Overlap of two p orbitals along their axes

Answer 205

Overlap of two s orbitals

Answer 206

Sidewise overlap of two parallel p orbitals

Answer 207

Hydrogen sulphides

Answer 208

All atoms in the ring are carbon

Answer 209

All atoms are SP² -hybridized

Answer 210

May be other atoms

Answer 211

All atoms are SP³ -hybridized

Answer 212

Anthracene

Answer 213

Cyclohexanol

Answer 214

Polymerization

Answer 215

Carbonization

Answer 216

Hybridization

Answer 217

Isomerisation

Answer 218

Four p-orbitals are involved

Answer 219

One s and 3 p-orbitals are involved

Answer 220

One p-orbital is involved

Answer 221

All p-orbitals are involved

Answer 222

Functional group

Answer 223

Structural

Answer 224

Un-saturated

Answer 225

Para-magnetic

Answer 226

Dimethyl ether

Answer 227

Diethyl ether

Answer 228

Tetrahedron

Answer 229

Antheracite

Answer 230

(C₆H₁₀O₅)n

Answer 231

C₆H₁₂O₆

Answer 232

CaSO₄. 0.5H₂O

Answer 233

Natural gas

Answer 234

Square planer

Answer 235

Tetrahedral

Answer 236

Ethanoic acid

Answer 237

-CHO group

Answer 238

-CH₃ group

Answer 239

- OH group

Answer 240

+NH₂ group

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