Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 2

2. Unsaturated hydrocarbons containing a double bond are called

Question 3

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

Question 4

4. The functional group isomer of dimethyl –ether is

Answer

Diethyl pether

Answer

Butyl alcohol

Answer

Ethyl alcohol

Answer

Prophyl alcohol

Question 5

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

Answer

The same vapour density

Answer

The same viscosity

Answer

Different molecular weights

Answer

Same molecular weights

Question 6

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

Answer

Isomerization

Answer

Polymerization

Answer

Condensation

Question 7

7. Pi bonds are produced by overlapping of

Answer

Un-hybrid orbitals

Answer

Hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Hybrid and un hybrid orbitals

Question 8

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

Answer

Domestic use

Answer

Sugar industry

Answer

Bake bricks

Answer

In glass industry

Question 9

9. Which of the following contains single bonds?

Question 10

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

Answer

Hydrogen sulphides

Question 11

11. In benzene carbon – carbon bonds are

Answer

Double covalent

Answer

3 single and 3 double

Answer

Single covalent

Answer

Of the order 1.5

Question 12

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

Question 13

13. The state of hybridization carbon in ethane is

Question 14

14. The number of isomers of C₆H₁₄ is:

Question 15

15. Hybridization explain the ________ of orbitals

Answer

Shape and Type of bonding

Answer

Type of Bonding

Answer

None of these

Question 16

16. Ethyl alcohol on ____________ gives ethane

Answer

Dehydrogenation

Answer

Dehydration

Question 17

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

Question 18

18. Alkanes cannot show cis-trans isomerism

Answer

The bond angle is 109.5°

Answer

0¯ bond is stronger than A-bond

Answer

0¯ bond required less energy to be rotated

Answer

Alkanes possess three groups attached to each carbon

Question 19

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

Question 20

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

Answer

PF₃ - pyramidal

Answer

CF₄ - tetrahedral

Answer

H₂O – tetrahedral

Answer

NH₃ - tetrahedral

Question 21

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

Answer

-CH₃ group

Answer

- OH group

Answer

-CHO group

Answer

+NH₂ group

Question 22

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

Answer

3 band pair one lone pair

Answer

3 lone pair 1 bond pair

Answer

2 band pair 2 lone pair

Answer

1 band pair 3 lone pair

Question 23

23. Which is the solid form of petroleum?

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. The carbocyclic compounds are those which have

Answer

All atoms are SP³ -hybridized

Answer

All atoms are SP² -hybridized

Answer

All atoms in the ring are carbon

Answer

May be other atoms

Question 26

26. Which one has zero octane number?

Answer

n – Heptane

Answer

iso – octane

Answer

n – Hexane

Question 27

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

Answer

None of these

Answer

Pi bond is broken

Answer

Both bonds are broken

Answer

Sigma bond is broken

Question 28

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

Answer

ClO₃¯-tetrahedral

Answer

NO₂¯ - trigonal palnar

Answer

SO₃²¯ - pyramidal

Answer

ClO₄¯ - tetrahedral

Question 29

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

Answer

45° and 90°

Answer

90° and 120°

Answer

120° only

Answer

90° and 180°

Question 30

30. Which of the following possess linear geometry

Question 31

31. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 32

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

Question 33

33. 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 34

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

Question 35

35. The major portion of natural oil is

Question 36

36. Which is the character of organic compounds

Answer

Rates of reactions are very fast

Answer

They possess particular properties

Answer

Mostly ionic in character

Question 37

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

Answer

Un-saturated

Answer

Para-magnetic

Question 38

38. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 39

39. The characteristic reactions of alkanes are

Answer

Addition reactions

Answer

Polymerization

Answer

Condensation reactions

Answer

Substitution reactions

Question 40

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

Question 41

41. Hydrocarbons contain

Answer

C and H only

Answer

C, H, and O only

Answer

C, H, O and N only

Answer

C and S only

Question 42

42. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 43

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

Answer

Polymerization

Answer

Isomerisation

Answer

Carbonization

Answer

Hybridization

Question 44

44. Polythene is a polymer of

Question 45

45. On passing ethane into concentrated sulphuric 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 46

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

Answer

Ammonium cyanate

Question 47

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

Answer

Anthracene

Answer

Cyclohexanol

Question 48

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

Answer

Chemical forces

Answer

Ionic properties

Answer

Carbon forming long chain or rings

Question 49

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

Answer

Natural gas

Question 50

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

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. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 53

53. Either show the phenomenon of

Answer

Functional group isomerism

Answer

Cis-trans isomerism

Answer

Metamerism

Answer

Position isomerism

Question 54

54. The active part in a molecule is called:

Answer

Ionic complex

Answer

Chemical bonding

Answer

Functional group

Answer

Homologous series

Question 55

55. The self-linking of carbon atoms is called

Answer

Catenation

Answer

None of these

Question 56

56. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 57

57. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 58

58. Which one is not an organic compound

Answer

Carbohydrates

Answer

None of these

Question 59

59. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 60

60. Vital force theory was rejected by

Question 61

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

Answer

Antheracite

Question 62

62. Ether shows the phenomenon of

Answer

Metamerism

Answer

Chain isomerism

Answer

Cis – trass isomerism

Answer

Position isomerism

Question 63

63. Normal by product of cracking is

Answer

All of these

Question 64

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

Answer

They exist in homologous series

Answer

Organic compounds are water soluble

Answer

They form long chain compounds

Answer

Organic compound chain compounds

Answer 138

Alkylation

Answer 139

Sulphonation

Answer 140

Position isomerism

Answer 141

Metamerism

Answer 142

Functional group isomerism

Answer 143

cis – trans isomerism

Answer 144

Diastereomers

Answer 145

Enantiomers

Answer 146

Positional isomers

Answer 147

Conformers

Answer 148

SiO₂+Al₂O₃

Answer 149

NF₃ - trigonal planar

Answer 150

H₂O - bent

Answer 151

AsF₅ - trigonal bipyramidal

Answer 152

BF₃ - trigonal planar

Answer 153

CaSO₄. 0.5H₂O

Answer 154

C₆H₁₂O₆

Answer 155

(C₆H₁₀O₅)n

Answer 156

Functional group

Answer 157

Metamerism

Answer 158

Having different M.P.

Answer 159

Having different chemical properties

Answer 160

Having different physical states

Answer 161

Having different B.P.

Answer 162

Compounds of S

Answer 163

Saturated hydrocarbons

Answer 164

Unsaturated hydrocarbon

Answer 165

One p-orbital is involved

Answer 166

One s and 3 p-orbitals are involved

Answer 167

All p-orbitals are involved

Answer 168

Four p-orbitals are involved

Answer 169

Structural

Answer 170

Functional group

Answer 171

It is more stable

Answer 172

The molecule is symmetrical around C – C

Answer 173

The molecule is asymmetrical around C – C bond

Answer 174

It is less stable

Answer 175

Three sigma and one Pi

Answer 176

Two sigma and two Pi

Answer 177

One sigma and three Pi

Answer 178

Homocyclic

Answer 179

None of these

Answer 180

Heterocyclic

Answer 181

Monocyclic

Answer 182

Having different physical states

Answer 183

Having different M.P.

Answer 184

Having different B.P.

Answer 185

Having different chemical properties

Answer 186

Sidewise overlap of two parallel p orbitals

Answer 187

Overlap of two p orbitals along their axes

Answer 188

Overlap of two s orbitals

Answer 189

Overlap of an s and a p orbital

Answer 190

None of these

Answer 191

Both a and b

Answer 192

Alkylation

Answer 193

Sulphonation

Answer 194

C₁₁H₂₄

Answer 195

C₁₃H₂₈

Answer 196

C₉H₂₀

Answer 197

C₁₂H₂₆

Answer 198

Tetrahedron

Answer 199

Vapourization

Answer 200

Crystallization

Answer 201

Reaction with aq KOH

Answer 202

Reaction with alcoholic KOH

Answer 203

Functional isomers

Answer 204

Chain isomers

Answer 205

Position isomers

Answer 206

Tetrahedral

Answer 207

Triangular

Answer 208

Square planner

Answer 209

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

Answer 210

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

Answer 211

Alkenes do not undergo addition reactions

Answer 212

Towards the addition reaction alkenes are more reactive than alkynes

Answer 213

Only HF and OF₂

Answer 214

None of these

Answer 215

All except SO₃

Answer 216

Catalytic cracking

Answer 217

Thermal cracking

Answer 218

Stem cracking

Answer 219

Normal cracking

Answer 220

NH₄⁺ - tetrahedral

Answer 221

SiCl₆²¯ -trigonal bipyramidal

Answer 222

ClO₂ - angular

Answer 223

PH₄⁺ - tetrahedral

Answer 224

Position isomerism

Answer 225

Metamerism

Answer 226

Functional group isomerism

Answer 227

Chain isomerism

Answer 228

Reforming process

Answer 229

Hydrogenation

Answer 230

Neo-octane

Answer 231

Neo-Pentane

Answer 232

None-reactive

Answer 233

None of these

Answer 234

In which atoms of C are in a series

Answer 235

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

Answer 236

Not in a series

Answer 237

It is costly

Answer 238

Pb is difficult to obtain in bulk qualities

Answer 239

The combustion product, lead causes air pollution

Answer 240

It damages the engine

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