Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. C₂H₂Cl₂ can show isomerism

Answer

Functional group

Answer

Metamerism

Question 2

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

Question 3

3. 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

Stem cracking

Answer

Catalytic cracking

Answer

Normal cracking

Answer

Thermal cracking

Question 4

4. Polythene is a polymer of

Question 5

5. Acetylene has a characteristic ethereal smell resembling that of:

Question 6

6. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 7

7. Hybridization explain the ________ of orbitals

Answer

Shape and Type of bonding

Answer

None of these

Answer

Type of Bonding

Question 8

8. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 9

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

Question 10

10. 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

None of these

Answer

Sigma bond is broken

Question 11

11. Which of the following has linear shape?

Answer

None of these

Question 12

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

Answer

Chain isomerism

Answer

Metamerism

Answer

Functional group isomerism

Answer

Position isomerism

Question 13

13. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 14

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

Answer

Antheracite

Question 15

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

Answer

Isomerization

Answer

Polymerization

Answer

Condensation

Question 16

16. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 17

17. 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

Position isomers

Answer

Chain isomers

Question 18

18. 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 19

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

Question 20

20. The demand of gasoline can be fulfilled by

Answer

Crystallization

Answer

Vapourization

Question 21

21. Alkanes cannot show cis-trans isomerism

Answer

0¯ bond required less energy to be rotated

Answer

Alkanes possess three groups attached to each carbon

Answer

0¯ bond is stronger than A-bond

Answer

The bond angle is 109.5°

Question 22

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

Answer

It is less stable

Answer

The molecule is asymmetrical around C – C bond

Answer

It is more stable

Answer

The molecule is symmetrical around C – C

Question 23

23. Bromoethane can be converted to ethane by

Answer

Reaction with alcoholic KOH

Answer

Reaction with aq KOH

Question 24

24. 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 two s orbitals

Answer

Overlap of an s and a p orbital

Question 25

25. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 26

26. 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 27

27. In benzene carbon – carbon bonds are

Answer

3 single and 3 double

Answer

Double covalent

Answer

Of the order 1.5

Answer

Single covalent

Question 28

28. Vital force theory was rejected by

Question 29

29. 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 30

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

Answer

Domestic use

Answer

In glass industry

Answer

Bake bricks

Answer

Sugar industry

Question 31

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

Answer

Positional isomers

Answer

Diastereomers

Answer

Enantiomers

Answer

Conformers

Question 32

32. Ethyl alcohol on ____________ gives ethane

Answer

Dehydrogenation

Answer

Dehydration

Question 33

33. Isomerism which is only found in alkanes?

Answer

cis – trans isomerism

Answer

Functional group isomerism

Answer

Position isomerism

Answer

Metamerism

Question 34

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

Answer

45° and 90°

Answer

90° and 180°

Answer

90° and 120°

Answer

120° only

Question 35

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

Answer

Organic compound chain compounds

Answer

They exist in homologous series

Answer

They form long chain compounds

Answer

Organic compounds are water soluble

Question 36

36. Acetylene had a characteristic ethereal smell resembling that of

Question 37

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

Answer

- OH group

Answer

-CHO group

Answer

-CH₃ group

Answer

+NH₂ group

Question 38

38. Organic compounds are soluble in all except

Question 39

39. The active part in a molecule is called:

Answer

Functional group

Answer

Ionic complex

Answer

Chemical bonding

Answer

Homologous series

Question 40

40. Which one is not an organic compound

Answer

Carbohydrates

Answer

None of these

Question 41

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

Question 42

42. Which of the following four molecules are polar: PH₃ OF₂ HF SO₃?

Answer

None of these

Answer

Only HF and OF₂

Answer

All except SO₃

Question 43

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

Question 44

44. The characteristic reactions of alkanes are

Answer

Condensation reactions

Answer

Addition reactions

Answer

Substitution reactions

Answer

Polymerization

Question 45

45. 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 46

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

Question 47

47. Rates of organic reactions are

Answer

None-reactive

Question 48

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

Question 49

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

Question 50

50. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 51

51. C₄H₈ can show isomerism

Answer

Functional group

Answer

Structural

Question 52

52. Which of the following contains single bonds?

Question 53

53. Coal is obtained from dead remains of

Answer

Both a and b

Question 54

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

Answer

Isomerisation

Answer

Carbonization

Answer

Polymerization

Answer

Hybridization

Question 55

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

Question 56

56. The state of hybridization carbon in ethane is

Question 57

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

Question 58

58. 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 59

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

Answer

Sulphonation

Answer

Alkylation

Question 60

60. Which of the following possess linear geometry

Question 61

61. In C₂H₂ carbon-carbon bond angle is

Question 62

62. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 63

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

Question 64

64. Methane is produced when aluminum carbide is treated with

Answer 124

Anthracene

Answer 125

Cyclohexanol

Answer 126

Alkylation

Answer 127

Sulphonation

Answer 128

Having different chemical properties

Answer 129

Having different physical states

Answer 130

Having different B.P.

Answer 131

Having different M.P.

Answer 132

ClO₄¯ - tetrahedral

Answer 133

ClO₃¯-tetrahedral

Answer 134

NO₂¯ - trigonal palnar

Answer 135

SO₃²¯ - pyramidal

Answer 136

Natural gas

Answer 137

Ionic properties

Answer 138

Chemical forces

Answer 139

Carbon forming long chain or rings

Answer 140

SiO₂+Al₂O₃

Answer 141

C₆H₁₂O₆

Answer 142

(C₆H₁₀O₅)n

Answer 143

CaSO₄. 0.5H₂O

Answer 144

C and H only

Answer 145

C, H, and O only

Answer 146

C, H, O and N only

Answer 147

C and S only

Answer 148

ClO₂ - angular

Answer 149

NH₄⁺ - tetrahedral

Answer 150

SiCl₆²¯ -trigonal bipyramidal

Answer 151

PH₄⁺ - tetrahedral

Answer 152

Having different M.P.

Answer 153

Having different B.P.

Answer 154

Having different chemical properties

Answer 155

Having different physical states

Answer 156

They possess particular properties

Answer 157

Mostly ionic in character

Answer 158

Rates of reactions are very fast

Answer 159

Hydrogen sulphides

Answer 160

Ethanoic acid

Answer 161

C₁₁H₂₄

Answer 162

C₁₃H₂₈

Answer 163

C₉H₂₀

Answer 164

C₁₂H₂₆

Answer 165

Para-magnetic

Answer 166

Un-saturated

Answer 167

Neo-Pentane

Answer 168

Neo-octane

Answer 169

iso – octane

Answer 170

n – Hexane

Answer 171

n – Heptane

Answer 172

All of these

Answer 173

Monocyclic

Answer 174

Homocyclic

Answer 175

None of these

Answer 176

Heterocyclic

Answer 177

Tetrahedron

Answer 178

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

Answer 179

None of these

Answer 180

Not in a series

Answer 181

In which atoms of C are in a series

Answer 182

Both A and B

Answer 183

Linear compounds

Answer 184

Cis-trans isomerism

Answer 185

Position isomerism

Answer 186

Metamerism

Answer 187

Functional group isomerism

Answer 188

Compounds of S

Answer 189

Saturated hydrocarbons

Answer 190

Unsaturated hydrocarbon

Answer 191

Hybrid orbitals

Answer 192

Hybrid and un hybrid orbitals

Answer 193

Un-hybrid orbitals

Answer 194

Atomic orbital and hybrid orbital

Answer 195

Natural gas

Answer 196

Two sigma and two Pi

Answer 197

One sigma and three Pi

Answer 198

Three sigma and one Pi

Answer 199

Four p-orbitals are involved

Answer 200

One p-orbital is involved

Answer 201

One s and 3 p-orbitals are involved

Answer 202

All p-orbitals are involved

Answer 203

Reforming process

Answer 204

Hydrogenation

Answer 205

Ammonium cyanate

Answer 206

The same vapour density

Answer 207

Different molecular weights

Answer 208

The same viscosity

Answer 209

Same molecular weights

Answer 210

Prophyl alcohol

Answer 211

Butyl alcohol

Answer 212

Ethyl alcohol

Answer 213

Diethyl pether

Answer 214

H₂O – tetrahedral

Answer 215

NH₃ - tetrahedral

Answer 216

CF₄ - tetrahedral

Answer 217

PF₃ - pyramidal

Answer 218

Sp³-hybridization

Answer 219

Sp²-hybridization

Answer 220

Dsp²-hybridization

Answer 221

Sp-hybridization

Answer 222

H₂O - bent

Answer 223

NF₃ - trigonal planar

Answer 224

AsF₅ - trigonal bipyramidal

Answer 225

BF₃ - trigonal planar

Answer 226

Metamerism

Answer 227

Cis – trass isomerism

Answer 228

Position isomerism

Answer 229

Chain isomerism

Answer 230

Ethyl hydrogen sulphate

Answer 231

Methyl alcohol

Answer 232

Methyl hydrogen sulphate

Answer 233

Ethyl alcohol

Answer 234

Triangular

Answer 235

Tetrahedral

Answer 236

Square planner

Answer 237

Alkenes do not undergo addition reactions

Answer 238

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

Answer 239

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

Answer 240

Towards the addition reaction alkenes are more reactive than alkynes

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