Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. Alkanes cannot show cis-trans isomerism

Answer

The bond angle is 109.5°

Answer

Alkanes possess three groups attached to each carbon

Answer

0¯ bond required less energy to be rotated

Answer

0¯ bond is stronger than A-bond

Question 2

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

Answer

Chain isomerism

Answer

Position isomerism

Answer

Metamerism

Answer

Functional group isomerism

Question 3

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

Answer

Bake bricks

Answer

Sugar industry

Answer

Domestic use

Answer

In glass industry

Question 4

4. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 5

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

Question 6

6. 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 7

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

Question 8

8. Ether shows the phenomenon of

Answer

Cis – trass isomerism

Answer

Metamerism

Answer

Chain isomerism

Answer

Position isomerism

Question 9

9. 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 10

10. The next homologue of C₁₀H₂₂ will be

Answer

C₁₁H₂₄

Answer

C₁₂H₂₆

Answer

C₉H₂₀

Answer

C₁₃H₂₈

Question 11

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

Answer

Un-saturated

Answer

Para-magnetic

Question 12

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

Question 13

13. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 14

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

Question 15

15. Polythene is a polymer of

Question 16

16. Which is the solid form of petroleum?

Question 17

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

Answer

Overlap of two p orbitals along their axes

Answer

Sidewise overlap of two parallel p orbitals

Answer

Overlap of an s and a p orbital

Answer

Overlap of two s orbitals

Question 18

18. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 19

19. Which one has zero octane number?

Answer

n – Hexane

Answer

iso – octane

Answer

n – Heptane

Question 20

20. Organic compounds are soluble in all except

Question 21

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

Answer

Homocyclic

Answer

Monocyclic

Answer

Heterocyclic

Answer

None of these

Question 22

22. Which one is not an organic compound

Answer

None of these

Answer

Carbohydrates

Question 23

23. Hydrocarbons contain

Answer

C and H only

Answer

C, H, O and N only

Answer

C, H, and O only

Answer

C and S only

Question 24

24. The active part in a molecule is called:

Answer

Functional group

Answer

Ionic complex

Answer

Chemical bonding

Answer

Homologous series

Question 25

25. Which statement is true regarding reactivity?

Answer

Alkenes do not undergo addition reactions

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

Question 26

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

Question 27

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

Question 28

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

Answer

Reforming process

Answer

Hydrogenation

Question 29

29. 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

Catalytic cracking

Answer

Thermal cracking

Answer

Stem cracking

Question 30

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

Answer

Ethyl hydrogen sulphate

Answer

Methyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Ethyl alcohol

Question 31

31. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 32

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

Answer

Different molecular weights

Answer

The same vapour density

Answer

Same molecular weights

Answer

The same viscosity

Question 33

33. Rates of organic reactions are

Answer

None-reactive

Question 34

34. Which of the following possess linear geometry

Question 35

35. Which of the following contains single bonds?

Question 36

36. The demand of gasoline can be fulfilled by

Answer

Vapourization

Answer

Crystallization

Question 37

37. On sp3 hybridization

Answer

Four p-orbitals are involved

Answer

All p-orbitals are involved

Answer

One s and 3 p-orbitals are involved

Answer

One p-orbital is involved

Question 38

38. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 39

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

Question 40

40. Wholer prepared urea from

Question 41

41. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Triangular

Answer

Tetrahedral

Answer

Square planner

Question 42

42. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 43

43. The characteristic reactions of alkanes are

Answer

Condensation reactions

Answer

Polymerization

Answer

Addition reactions

Answer

Substitution reactions

Question 44

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

Answer

Pi bond is broken

Answer

Both bonds are broken

Answer

Sigma bond is broken

Answer

None of these

Question 45

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

Question 46

46. Hybridization explain the ________ of orbitals

Answer

None of these

Answer

Shape and Type of bonding

Answer

Type of Bonding

Question 47

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

Answer

Cyclohexanol

Answer

Anthracene

Question 48

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

Answer

NF₃ - trigonal planar

Answer

BF₃ - trigonal planar

Answer

AsF₅ - trigonal bipyramidal

Answer

H₂O - bent

Question 49

49. Either show the phenomenon of

Answer

Position isomerism

Answer

Functional group isomerism

Answer

Metamerism

Answer

Cis-trans isomerism

Question 50

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

Question 51

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

Answer

Natural gas

Question 52

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

Question 53

53. The major portion of natural oil is

Question 54

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

Answer

Sp-hybridization

Answer

Sp²-hybridization

Answer

Sp³-hybridization

Answer

Dsp²-hybridization

Question 55

55. 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 56

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

Question 57

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

Question 58

58. Coal heated in the absence of air of about 500-1000⁰C is converted to

Question 59

59. Acetylene had a characteristic ethereal smell resembling that of

Question 60

60. Methane is produced when aluminum carbide is treated with

Question 61

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

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

ClO₂ - angular

Answer

NH₄⁺ - tetrahedral

Answer

PH₄⁺ - tetrahedral

Question 62

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

Answer

Diastereomers

Answer

Positional isomers

Answer

Conformers

Answer

Enantiomers

Question 63

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

Answer

Alkylation

Answer

Sulphonation

Question 64

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

Answer

120° only

Answer

45° and 90°

Answer

90° and 120°

Answer

90° and 180°

Answer 128

Chain isomers

Answer 129

Position isomers

Answer 130

Functional isomers

Answer 131

Ethyl alcohol

Answer 132

Diethyl pether

Answer 133

Prophyl alcohol

Answer 134

Butyl alcohol

Answer 135

None of these

Answer 136

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

Answer 137

In which atoms of C are in a series

Answer 138

Not in a series

Answer 139

Two sigma and two Pi

Answer 140

One sigma and three Pi

Answer 141

Three sigma and one Pi

Answer 142

Methyl alcohol

Answer 143

Ethyl hydrogen sulphate

Answer 144

Methyl hydrogen sulphate

Answer 145

Ethyl alcohol

Answer 146

Hydrogen sulphides

Answer 147

Tetrahedron

Answer 148

Ethanoic acid

Answer 149

Having different physical states

Answer 150

Having different M.P.

Answer 151

Having different B.P.

Answer 152

Having different chemical properties

Answer 153

Antheracite

Answer 154

Carbonization

Answer 155

Hybridization

Answer 156

Polymerization

Answer 157

Isomerisation

Answer 158

Ammonium cyanate

Answer 159

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

Answer 160

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

Answer 161

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

Answer 162

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

Answer 163

Mostly ionic in character

Answer 164

Rates of reactions are very fast

Answer 165

They possess particular properties

Answer 166

Natural gas

Answer 167

SO₃²¯ - pyramidal

Answer 168

ClO₄¯ - tetrahedral

Answer 169

ClO₃¯-tetrahedral

Answer 170

NO₂¯ - trigonal palnar

Answer 171

Reaction with alcoholic KOH

Answer 172

Reaction with aq KOH

Answer 173

3 single and 3 double

Answer 174

Of the order 1.5

Answer 175

Double covalent

Answer 176

Single covalent

Answer 177

None of these

Answer 178

Catenation

Answer 179

Atomic orbital and hybrid orbital

Answer 180

Hybrid and un hybrid orbitals

Answer 181

Hybrid orbitals

Answer 182

Un-hybrid orbitals

Answer 183

Alkylation

Answer 184

Sulphonation

Answer 185

(C₆H₁₀O₅)n

Answer 186

C₆H₁₂O₆

Answer 187

CaSO₄. 0.5H₂O

Answer 188

Metamerism

Answer 189

Functional group

Answer 190

Dehydration

Answer 191

Dehydrogenation

Answer 192

Chemical forces

Answer 193

Ionic properties

Answer 194

Carbon forming long chain or rings

Answer 195

3 lone pair 1 bond pair

Answer 196

1 band pair 3 lone pair

Answer 197

3 band pair one lone pair

Answer 198

2 band pair 2 lone pair

Answer 199

Position isomerism

Answer 200

Functional group isomerism

Answer 201

cis – trans isomerism

Answer 202

Metamerism

Answer 203

Having different physical states

Answer 204

Having different B.P.

Answer 205

Having different chemical properties

Answer 206

Having different M.P.

Answer 207

All of these

Answer 208

All atoms in the ring are carbon

Answer 209

All atoms are SP³ -hybridized

Answer 210

May be other atoms

Answer 211

All atoms are SP² -hybridized

Answer 212

Both a and b

Answer 213

They exist in homologous series

Answer 214

They form long chain compounds

Answer 215

Organic compound chain compounds

Answer 216

Organic compounds are water soluble

Answer 217

It is costly

Answer 218

Pb is difficult to obtain in bulk qualities

Answer 219

The combustion product, lead causes air pollution

Answer 220

It damages the engine

Answer 221

Functional group

Answer 222

Structural

Answer 223

Linear compounds

Answer 224

Both A and B

Answer 225

The molecule is asymmetrical around C – C bond

Answer 226

It is less stable

Answer 227

It is more stable

Answer 228

The molecule is symmetrical around C – C

Answer 229

None of these

Answer 230

C₂H₂Cl₂

Answer 231

+NH₂ group

Answer 232

-CH₃ group

Answer 233

-CHO group

Answer 234

- OH group

Answer 235

Isomerization

Answer 236

Condensation

Answer 237

Polymerization

Answer 238

Compounds of S

Answer 239

Unsaturated hydrocarbon

Answer 240

Saturated hydrocarbons

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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