Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. What kind of hybrid orbitals are utilized by the carbon atom in CF₄ molecules?

Question 2

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

Question 3

3. The state of hybridization carbon in ethane is

Question 4

4. The demand of gasoline can be fulfilled by

Answer

Crystallization

Answer

Vapourization

Question 5

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

Question 6

6. In C₂H₂ carbon-carbon bond angle is

Question 7

7. Pi bonds are produced by overlapping of

Answer

Hybrid orbitals

Answer

Un-hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Hybrid and un hybrid orbitals

Question 8

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

Answer

Para-magnetic

Answer

Un-saturated

Question 9

9. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 10

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

Answer

Reforming process

Answer

Hydrogenation

Question 11

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

Question 12

12. Hybridization explain the ________ of orbitals

Answer

None of these

Answer

Type of Bonding

Answer

Shape and Type of bonding

Question 13

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

Question 14

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

Answer

The same viscosity

Answer

Same molecular weights

Answer

Different molecular weights

Answer

The same vapour density

Question 15

15. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 16

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

Question 17

17. Organic compounds are soluble in all except

Question 18

18. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 19

19. Which of the following is complex?

Answer

C₆H₁₂O₆

Answer

CaSO₄. 0.5H₂O

Answer

(C₆H₁₀O₅)n

Question 20

20. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 21

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

Answer

Sulphonation

Answer

Alkylation

Question 22

22. Rates of organic reactions are

Answer

None-reactive

Question 23

23. Coal is obtained from dead remains of

Answer

Both a and b

Question 24

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

Answer

Ethyl alcohol

Answer

Ethyl hydrogen sulphate

Answer

Methyl alcohol

Answer

Methyl hydrogen sulphate

Question 25

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

Question 26

26. Straight chain hydrocarbons are

Answer

Not in a series

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

Question 27

27. 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

Chain isomers

Answer

Functional isomers

Answer

Position isomers

Question 28

28. Petroleum is mainly a mixture of

Answer

Saturated hydrocarbons

Answer

Unsaturated hydrocarbon

Answer

Compounds of S

Question 29

29. Which one is not an organic compound

Answer

None of these

Answer

Carbohydrates

Question 30

30. Either show the phenomenon of

Answer

Metamerism

Answer

Functional group isomerism

Answer

Position isomerism

Answer

Cis-trans isomerism

Question 31

31. The next homologue of C₁₀H₂₂ will be

Answer

C₁₃H₂₈

Answer

C₁₁H₂₄

Answer

C₁₂H₂₆

Answer

C₉H₂₀

Question 32

32. The perchloric acid molecule contains:

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.

Answer

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

Question 33

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

Answer

Ethanoic acid

Question 34

34. Which is the solid form of petroleum?

Question 35

35. 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

Thermal cracking

Answer

Normal cracking

Answer

Catalytic cracking

Answer

Stem cracking

Question 36

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

Answer

NF₃ - trigonal planar

Answer

H₂O - bent

Answer

BF₃ - trigonal planar

Answer

AsF₅ - trigonal bipyramidal

Question 37

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

Answer

PF₃ - pyramidal

Answer

NH₃ - tetrahedral

Answer

H₂O – tetrahedral

Answer

CF₄ - tetrahedral

Question 38

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

Question 39

39. Hydrocarbons contain

Answer

C and H only

Answer

C and S only

Answer

C, H, and O only

Answer

C, H, O and N only

Question 40

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

Question 41

41. The essential component of organic compound is

Question 42

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

Answer

Hydrogen sulphides

Question 43

43. 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

Two sigma and two Pi

Answer

Three sigma and one Pi

Question 44

44. The active part in a molecule is called:

Answer

Ionic complex

Answer

Functional group

Answer

Chemical bonding

Answer

Homologous series

Question 45

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

Answer

Domestic use

Answer

Sugar industry

Answer

Bake bricks

Answer

In glass industry

Question 46

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

Answer

Alkylation

Answer

Sulphonation

Question 47

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

Answer

Ammonium cyanate

Question 48

48. Which statement is true regarding reactivity?

Answer

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

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

Answer

Alkenes do not undergo addition reactions

Question 49

49. 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 50

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

Answer

Tetrahedron

Question 51

51. Polythene is a polymer of

Question 52

52. On sp3 hybridization

Answer

One p-orbital is involved

Answer

Four p-orbitals are involved

Answer

All p-orbitals are involved

Answer

One s and 3 p-orbitals are involved

Question 53

53. Ether shows the phenomenon of

Answer

Chain isomerism

Answer

Metamerism

Answer

Cis – trass isomerism

Answer

Position isomerism

Question 54

54. Alkanes cannot show cis-trans isomerism

Answer

0¯ bond is stronger than A-bond

Answer

The bond angle is 109.5°

Answer

0¯ bond required less energy to be rotated

Answer

Alkanes possess three groups attached to each carbon

Question 55

55. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 56

56. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 57

57. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 58

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

Answer

Natural gas

Question 59

59. C₂H₂Cl₂ can show isomerism

Answer

Functional group

Answer

Metamerism

Question 60

60. Vital force theory was rejected by

Question 61

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

Answer

Enantiomers

Answer

Diastereomers

Answer

Positional isomers

Answer

Conformers

Question 62

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

Question 63

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

Answer

90° and 120°

Answer

90° and 180°

Answer

45° and 90°

Answer

120° only

Question 64

64. Which of the following has linear shape?

Answer

None of these

Answer 126

Condensation

Answer 127

Isomerization

Answer 128

Polymerization

Answer 129

None of these

Answer 130

Homocyclic

Answer 131

Heterocyclic

Answer 132

Monocyclic

Answer 133

Structural

Answer 134

Functional group

Answer 135

Triangular

Answer 136

Square planner

Answer 137

Tetrahedral

Answer 138

Having different M.P.

Answer 139

Having different physical states

Answer 140

Having different chemical properties

Answer 141

Having different B.P.

Answer 142

Overlap of two s orbitals

Answer 143

Overlap of an s and a p orbital

Answer 144

Overlap of two p orbitals along their axes

Answer 145

Sidewise overlap of two parallel p orbitals

Answer 146

Ethyl alcohol

Answer 147

Methyl alcohol

Answer 148

Methyl hydrogen sulphate

Answer 149

Ethyl hydrogen sulphate

Answer 150

1 band pair 3 lone pair

Answer 151

2 band pair 2 lone pair

Answer 152

3 band pair one lone pair

Answer 153

3 lone pair 1 bond pair

Answer 154

The molecule is asymmetrical around C – C bond

Answer 155

It is more stable

Answer 156

The molecule is symmetrical around C – C

Answer 157

It is less stable

Answer 158

ClO₄¯ - tetrahedral

Answer 159

NO₂¯ - trigonal palnar

Answer 160

SO₃²¯ - pyramidal

Answer 161

ClO₃¯-tetrahedral

Answer 162

Hybridization

Answer 163

Carbonization

Answer 164

Polymerization

Answer 165

Isomerisation

Answer 166

n – Hexane

Answer 167

iso – octane

Answer 168

n – Heptane

Answer 169

All of these

Answer 170

Position isomerism

Answer 171

cis – trans isomerism

Answer 172

Metamerism

Answer 173

Functional group isomerism

Answer 174

All atoms are SP³ -hybridized

Answer 175

All atoms are SP² -hybridized

Answer 176

All atoms in the ring are carbon

Answer 177

May be other atoms

Answer 178

They exist in homologous series

Answer 179

Organic compounds are water soluble

Answer 180

They form long chain compounds

Answer 181

Organic compound chain compounds

Answer 182

Both A and B

Answer 183

Linear compounds

Answer 184

The combustion product, lead causes air pollution

Answer 185

Pb is difficult to obtain in bulk qualities

Answer 186

It damages the engine

Answer 187

It is costly

Answer 188

Reaction with aq KOH

Answer 189

Reaction with alcoholic KOH

Answer 190

Diethyl ether

Answer 191

Dimethyl ether

Answer 192

Having different M.P.

Answer 193

Having different physical states

Answer 194

Having different chemical properties

Answer 195

Having different B.P.

Answer 196

Ionic properties

Answer 197

Carbon forming long chain or rings

Answer 198

Chemical forces

Answer 199

Antheracite

Answer 200

3 single and 3 double

Answer 201

Single covalent

Answer 202

Double covalent

Answer 203

Of the order 1.5

Answer 204

Butyl alcohol

Answer 205

Prophyl alcohol

Answer 206

Diethyl pether

Answer 207

Ethyl alcohol

Answer 208

Dehydration

Answer 209

Dehydrogenation

Answer 210

They possess particular properties

Answer 211

Rates of reactions are very fast

Answer 212

Mostly ionic in character

Answer 213

Cyclohexanol

Answer 214

Anthracene

Answer 215

SiCl₆²¯ -trigonal bipyramidal

Answer 216

ClO₂ - angular

Answer 217

NH₄⁺ - tetrahedral

Answer 218

PH₄⁺ - tetrahedral

Answer 219

Sigma bond is broken

Answer 220

None of these

Answer 221

Both bonds are broken

Answer 222

Pi bond is broken

Answer 223

Catenation

Answer 224

None of these

Answer 225

Addition reactions

Answer 226

Polymerization

Answer 227

Substitution reactions

Answer 228

Condensation reactions

Answer 229

Metamerism

Answer 230

Functional group isomerism

Answer 231

Chain isomerism

Answer 232

Position isomerism

Answer 233

-CHO group

Answer 234

-CH₃ group

Answer 235

+NH₂ group

Answer 236

- OH group

Answer 237

Dsp²-hybridization

Answer 238

Sp²-hybridization

Answer 239

Sp-hybridization

Answer 240

Sp³-hybridization

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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