Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Answer

Hydrogen sulphides

Question 2

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

Answer

Ethanoic acid

Question 3

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

Question 4

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

Question 5

5. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 6

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

Answer

Para-magnetic

Answer

Un-saturated

Question 7

7. Which one has zero octane number?

Answer

iso – octane

Answer

n – Heptane

Answer

n – Hexane

Question 8

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

Answer

Ammonium cyanate

Question 9

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

Answer

Homocyclic

Answer

Monocyclic

Answer

None of these

Answer

Heterocyclic

Question 10

10. Wholer prepared urea from

Question 11

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

Answer

2 band pair 2 lone pair

Answer

1 band pair 3 lone pair

Answer

3 lone pair 1 bond pair

Answer

3 band pair one lone pair

Question 12

12. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 13

13. Ether shows the phenomenon of

Answer

Metamerism

Answer

Chain isomerism

Answer

Position isomerism

Answer

Cis – trass isomerism

Question 14

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

Question 15

15. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Triangular

Answer

Tetrahedral

Answer

Square planner

Question 16

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

Answer

They exist in homologous series

Answer

Organic compounds are water soluble

Answer

Organic compound chain compounds

Answer

They form long chain compounds

Question 17

17. Which of the following possess linear geometry

Question 18

18. Which one is not an organic compound

Answer

None of these

Answer

Carbohydrates

Question 19

19. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 20

20. In C₂H₂ carbon-carbon bond angle is

Question 21

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

Answer

Condensation

Answer

Polymerization

Answer

Isomerization

Question 22

22. On sp3 hybridization

Answer

Four p-orbitals are involved

Answer

One s and 3 p-orbitals are involved

Answer

One p-orbital is involved

Answer

All p-orbitals are involved

Question 23

23. 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 is costly

Answer

Pb is difficult to obtain in bulk qualities

Answer

It damages the engine

Question 24

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

Question 25

25. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 26

26. 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

Normal cracking

Answer

Thermal cracking

Answer

Stem cracking

Question 27

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

Answer

The molecule is symmetrical around C – C

Answer

It is less stable

Answer

It is more stable

Answer

The molecule is asymmetrical around C – C bond

Question 28

28. Rates of organic reactions are

Answer

None-reactive

Question 29

29. Coal is obtained from dead remains of

Answer

Both a and b

Question 30

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

Answer

Methyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Ethyl hydrogen sulphate

Answer

Ethyl alcohol

Question 31

31. Which is the solid form of petroleum?

Question 32

32. The demand of gasoline can be fulfilled by

Answer

Vapourization

Answer

Crystallization

Question 33

33. The essential component of organic compound is

Question 34

34. The self-linking of carbon atoms is called

Answer

Catenation

Answer

None of these

Question 35

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

Answer

Methyl alcohol

Answer

Ethyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Ethyl hydrogen sulphate

Question 36

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

Answer

Positional isomers

Answer

Enantiomers

Answer

Diastereomers

Answer

Conformers

Question 37

37. The components of petroleum can be separated due to

Answer

Having different B.P.

Answer

Having different M.P.

Answer

Having different chemical properties

Answer

Having different physical states

Question 38

38. The state of hybridization carbon in ethane is

Question 39

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

Answer

In glass industry

Answer

Domestic use

Answer

Bake bricks

Answer

Sugar industry

Question 40

40. 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 41

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

Question 42

42. The carbocyclic compounds are those which have

Answer

All atoms are SP² -hybridized

Answer

May be other atoms

Answer

All atoms in the ring are carbon

Answer

All atoms are SP³ -hybridized

Question 43

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

Question 44

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

Answer

NH₄⁺ - tetrahedral

Answer

ClO₂ - angular

Answer

PH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Question 45

45. A π (pi) bond is the result of the

Answer

Overlap of an s and a p orbital

Answer

Sidewise overlap of two parallel p orbitals

Answer

Overlap of two s orbitals

Answer

Overlap of two p orbitals along their axes

Question 46

46. Organic compounds are soluble in all except

Question 47

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

Question 48

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

Answer

None of these

Answer

Pi bond is broken

Answer

Sigma bond is broken

Answer

Both bonds are broken

Question 49

49. 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 50

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

Answer

Sulphonation

Answer

Alkylation

Question 51

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

Answer

Alkylation

Answer

Sulphonation

Question 52

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

Question 53

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

Answer

Chemical forces

Answer

Carbon forming long chain or rings

Answer

Ionic properties

Question 54

54. Straight chain hydrocarbons are

Answer

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

Answer

Not in a series

Answer

In which atoms of C are in a series

Answer

None of these

Question 55

55. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 56

56. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 57

57. Hydrocarbons contain

Answer

C and H only

Answer

C, H, O and N only

Answer

C and S only

Answer

C, H, and O only

Question 58

58. Pi bonds are produced by overlapping of

Answer

Atomic orbital and hybrid orbital

Answer

Hybrid orbitals

Answer

Un-hybrid orbitals

Answer

Hybrid and un hybrid orbitals

Question 59

59. 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

One sigma and three Pi

Answer

Three sigma and one Pi

Answer

Two sigma and two Pi

Question 60

60. 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

Chain isomers

Answer

Functional isomers

Question 61

61. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 62

62. An isomer of ethanol is:

Answer

Dimethyl ether

Answer

Diethyl ether

Question 63

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

Question 64

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

Answer 133

AsF₅ - trigonal bipyramidal

Answer 134

H₂O - bent

Answer 135

BF₃ - trigonal planar

Answer 136

NF₃ - trigonal planar

Answer 137

Functional group

Answer 138

Chemical bonding

Answer 139

Homologous series

Answer 140

Ionic complex

Answer 141

Cyclohexanol

Answer 142

Anthracene

Answer 143

Reaction with aq KOH

Answer 144

Reaction with alcoholic KOH

Answer 145

Same molecular weights

Answer 146

Different molecular weights

Answer 147

The same viscosity

Answer 148

The same vapour density

Answer 149

None of these

Answer 150

Natural gas

Answer 151

Functional group isomerism

Answer 152

Position isomerism

Answer 153

cis – trans isomerism

Answer 154

Metamerism

Answer 155

None of these

Answer 156

Shape and Type of bonding

Answer 157

Type of Bonding

Answer 158

ClO₃¯-tetrahedral

Answer 159

NO₂¯ - trigonal palnar

Answer 160

ClO₄¯ - tetrahedral

Answer 161

SO₃²¯ - pyramidal

Answer 162

Only HF and OF₂

Answer 163

None of these

Answer 164

All except SO₃

Answer 165

Having different physical states

Answer 166

Having different B.P.

Answer 167

Having different chemical properties

Answer 168

Having different M.P.

Answer 169

None of these

Answer 170

Addition reactions

Answer 171

Substitution reactions

Answer 172

Polymerization

Answer 173

Condensation reactions

Answer 174

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

Answer 175

Alkenes do not undergo addition reactions

Answer 176

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

Answer 177

Towards the addition reaction alkenes are more reactive than alkynes

Answer 178

45° and 90°

Answer 179

90° and 120°

Answer 180

90° and 180°

Answer 181

120° only

Answer 182

Antheracite

Answer 183

Reforming process

Answer 184

Hydrogenation

Answer 185

Tetrahedral

Answer 186

Square planer

Answer 187

Compounds of S

Answer 188

Saturated hydrocarbons

Answer 189

Unsaturated hydrocarbon

Answer 190

C₉H₂₀

Answer 191

C₁₃H₂₈

Answer 192

C₁₁H₂₄

Answer 193

C₁₂H₂₆

Answer 194

Functional group

Answer 195

Metamerism

Answer 196

All of these

Answer 197

Of the order 1.5

Answer 198

3 single and 3 double

Answer 199

Double covalent

Answer 200

Single covalent

Answer 201

Position isomerism

Answer 202

Metamerism

Answer 203

Functional group isomerism

Answer 204

Chain isomerism

Answer 205

(C₆H₁₀O₅)n

Answer 206

C₆H₁₂O₆

Answer 207

CaSO₄. 0.5H₂O

Answer 208

Tetrahedron

Answer 209

Prophyl alcohol

Answer 210

Butyl alcohol

Answer 211

Diethyl pether

Answer 212

Ethyl alcohol

Answer 213

Dsp²-hybridization

Answer 214

Sp³-hybridization

Answer 215

Sp²-hybridization

Answer 216

Sp-hybridization

Answer 217

Carbonization

Answer 218

Hybridization

Answer 219

Isomerisation

Answer 220

Polymerization

Answer 221

-CHO group

Answer 222

+NH₂ group

Answer 223

-CH₃ group

Answer 224

- OH group

Answer 225

Functional group

Answer 226

Structural

Answer 227

Metamerism

Answer 228

Functional group isomerism

Answer 229

Position isomerism

Answer 230

Cis-trans isomerism

Answer 231

Dehydrogenation

Answer 232

Dehydration

Answer 233

0¯ bond required less energy to be rotated

Answer 234

The bond angle is 109.5°

Answer 235

0¯ bond is stronger than A-bond

Answer 236

Alkanes possess three groups attached to each carbon

Answer 237

H₂O – tetrahedral

Answer 238

CF₄ - tetrahedral

Answer 239

PF₃ - pyramidal

Answer 240

NH₃ - tetrahedral

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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