Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. The components of petroleum can be separated due to

Answer

Having different chemical properties

Answer

Having different M.P.

Answer

Having different physical states

Answer

Having different B.P.

Question 2

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

Answer

Natural gas

Question 3

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

Question 4

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

Question 5

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

Answer

Tetrahedron

Question 6

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

Answer

Alkylation

Answer

Sulphonation

Question 7

7. Petroleum is mainly a mixture of

Answer

Compounds of S

Answer

Saturated hydrocarbons

Answer

Unsaturated hydrocarbon

Question 8

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

Question 9

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

Question 10

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

Answer

Position isomerism

Answer

Functional group isomerism

Answer

Chain isomerism

Answer

Metamerism

Question 11

11. In C₂H₂ carbon-carbon bond angle is

Question 12

12. The number of isomers of C₆H₁₄ is:

Question 13

13. Pi bonds are produced by overlapping of

Answer

Atomic orbital and hybrid orbital

Answer

Un-hybrid orbitals

Answer

Hybrid orbitals

Answer

Hybrid and un hybrid orbitals

Question 14

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

Answer

3 lone pair 1 bond pair

Answer

3 band pair one lone pair

Answer

2 band pair 2 lone pair

Answer

1 band pair 3 lone pair

Question 15

15. 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 16

16. The state of hybridization carbon in ethane is

Question 17

17. Which of the following possess linear geometry

Question 18

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

Question 19

19. On sp3 hybridization

Answer

All p-orbitals are involved

Answer

One p-orbital is involved

Answer

One s and 3 p-orbitals are involved

Answer

Four p-orbitals are involved

Question 20

20. Ethyl alcohol on ____________ gives ethane

Answer

Dehydrogenation

Answer

Dehydration

Question 21

21. Which of the following contains single bonds?

Question 22

22. 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

Functional isomers

Answer

Chain isomers

Answer

Position isomers

Question 23

23. 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 24

24. The functional group isomer of dimethyl –ether is

Answer

Prophyl alcohol

Answer

Ethyl alcohol

Answer

Diethyl pether

Answer

Butyl alcohol

Question 25

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

Answer

Positional isomers

Answer

Enantiomers

Answer

Conformers

Answer

Diastereomers

Question 26

26. C₄H₈ can show isomerism

Answer

Functional group

Answer

Structural

Question 27

27. Methane is produced when aluminum carbide is treated with

Question 28

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

Answer

-CH₃ group

Answer

- OH group

Answer

-CHO group

Answer

+NH₂ group

Question 29

29. Which statement is true regarding reactivity?

Answer

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

Answer

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

Answer

Towards the addition reaction alkenes are more reactive than alkynes

Answer

Alkenes do not undergo addition reactions

Question 30

30. Which one is not an organic compound

Answer

None of these

Answer

Carbohydrates

Question 31

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

Answer

NH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

PH₄⁺ - tetrahedral

Answer

ClO₂ - angular

Question 32

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

Answer

Overlap of two s orbitals

Answer

Overlap of two p orbitals along their axes

Answer

Overlap of an s and a p orbital

Answer

Sidewise overlap of two parallel p orbitals

Question 33

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

Question 34

34. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 35

35. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Triangular

Answer

Tetrahedral

Answer

Square planner

Question 36

36. Vital force theory was rejected by

Question 37

37. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 38

38. Wholer prepared urea from

Question 39

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

Answer

Para-magnetic

Answer

Un-saturated

Question 42

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

Question 43

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

Answer

Heterocyclic

Answer

None of these

Answer

Monocyclic

Answer

Homocyclic

Question 44

44. 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 45

45. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 46

46. The structure of benzene is

Answer

Tetrahedral

Answer

Square planer

Question 47

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

Answer

Ethyl hydrogen sulphate

Answer

Ethyl alcohol

Answer

Methyl alcohol

Answer

Methyl hydrogen sulphate

Question 48

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

Answer

Antheracite

Question 49

49. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 50

50. Which of the following has linear shape?

Answer

None of these

Question 51

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

Answer

Organic compound chain compounds

Answer

Organic compounds are water soluble

Answer

They form long chain compounds

Answer

They exist in homologous series

Question 52

52. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 53

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

Answer

Ethanoic acid

Question 54

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

Answer

In glass industry

Answer

Domestic use

Answer

Sugar industry

Answer

Bake bricks

Question 55

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

Answer

Chemical forces

Answer

Carbon forming long chain or rings

Answer

Ionic properties

Question 56

56. The active part in a molecule is called:

Answer

Functional group

Answer

Ionic complex

Answer

Chemical bonding

Answer

Homologous series

Question 57

57. In benzene carbon – carbon bonds are

Answer

Single covalent

Answer

Of the order 1.5

Answer

3 single and 3 double

Answer

Double covalent

Question 58

58. Which of the following species is planar?

Question 59

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

Answer

Sp²-hybridization

Answer

Sp-hybridization

Answer

Sp³-hybridization

Answer

Dsp²-hybridization

Question 60

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

Question 61

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

Answer

Sulphonation

Answer

Alkylation

Question 62

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

Answer

NF₃ - trigonal planar

Answer

AsF₅ - trigonal bipyramidal

Answer

H₂O - bent

Answer

BF₃ - trigonal planar

Question 63

63. Isomerism which is only found in alkanes?

Answer

cis – trans isomerism

Answer

Position isomerism

Answer

Metamerism

Answer

Functional group isomerism

Question 64

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

Answer

Hydrogen sulphides

Answer 134

It damages the engine

Answer 135

The combustion product, lead causes air pollution

Answer 136

Pb is difficult to obtain in bulk qualities

Answer 137

It is costly

Answer 138

None-reactive

Answer 139

C, H, and O only

Answer 140

C, H, O and N only

Answer 141

C and S only

Answer 142

C and H only

Answer 143

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

Answer 144

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

Answer 145

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

Answer 146

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

Answer 147

All of these

Answer 148

Polymerization

Answer 149

Condensation reactions

Answer 150

Substitution reactions

Answer 151

Addition reactions

Answer 152

None of these

Answer 153

PF₃ - pyramidal

Answer 154

CF₄ - tetrahedral

Answer 155

NH₃ - tetrahedral

Answer 156

H₂O – tetrahedral

Answer 157

SiO₂+Al₂O₃

Answer 158

Both a and b

Answer 159

CaSO₄. 0.5H₂O

Answer 160

(C₆H₁₀O₅)n

Answer 161

C₆H₁₂O₆

Answer 162

Sigma bond is broken

Answer 163

Pi bond is broken

Answer 164

None of these

Answer 165

Both bonds are broken

Answer 166

Having different physical states

Answer 167

Having different B.P.

Answer 168

Having different chemical properties

Answer 169

Having different M.P.

Answer 170

The molecule is asymmetrical around C – C bond

Answer 171

It is more stable

Answer 172

It is less stable

Answer 173

The molecule is symmetrical around C – C

Answer 174

Dimethyl ether

Answer 175

Diethyl ether

Answer 176

Functional group

Answer 177

Metamerism

Answer 178

Ammonium cyanate

Answer 179

90° and 120°

Answer 180

45° and 90°

Answer 181

90° and 180°

Answer 182

120° only

Answer 183

n – Heptane

Answer 184

n – Hexane

Answer 185

iso – octane

Answer 186

Crystallization

Answer 187

Vapourization

Answer 188

NO₂¯ - trigonal palnar

Answer 189

ClO₄¯ - tetrahedral

Answer 190

SO₃²¯ - pyramidal

Answer 191

ClO₃¯-tetrahedral

Answer 192

C₂H₂Cl₂

Answer 193

Neo-Pentane

Answer 194

Neo-octane

Answer 195

Thermal cracking

Answer 196

Stem cracking

Answer 197

Catalytic cracking

Answer 198

Normal cracking

Answer 199

Ethyl hydrogen sulphate

Answer 200

Methyl hydrogen sulphate

Answer 201

Ethyl alcohol

Answer 202

Methyl alcohol

Answer 203

Hydrogenation

Answer 204

Reforming process

Answer 205

Cyclohexanol

Answer 206

Anthracene

Answer 207

The same viscosity

Answer 208

Same molecular weights

Answer 209

Different molecular weights

Answer 210

The same vapour density

Answer 211

Position isomerism

Answer 212

Cis-trans isomerism

Answer 213

Functional group isomerism

Answer 214

Metamerism

Answer 215

Condensation

Answer 216

Polymerization

Answer 217

Isomerization

Answer 218

In which atoms of C are in a series

Answer 219

Not in a series

Answer 220

None of these

Answer 221

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

Answer 222

None of these

Answer 223

Type of Bonding

Answer 224

Shape and Type of bonding

Answer 225

C₁₁H₂₄

Answer 226

C₁₃H₂₈

Answer 227

C₁₂H₂₆

Answer 228

C₉H₂₀

Answer 229

Alkanes possess three groups attached to each carbon

Answer 230

0¯ bond is stronger than A-bond

Answer 231

The bond angle is 109.5°

Answer 232

0¯ bond required less energy to be rotated

Answer 233

Position isomerism

Answer 234

Chain isomerism

Answer 235

Metamerism

Answer 236

Cis – trass isomerism

Answer 237

All atoms are SP² -hybridized

Answer 238

All atoms in the ring are carbon

Answer 239

May be other atoms

Answer 240

All atoms are SP³ -hybridized

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