Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. On passing ethane into concentrated suphuric 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 2

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

Answer

Ammonium cyanate

Question 3

3. The next homologue of C₁₀H₂₂ will be

Answer

C₁₃H₂₈

Answer

C₁₁H₂₄

Answer

C₁₂H₂₆

Answer

C₉H₂₀

Question 4

4. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 5

5. The functional group isomer of dimethyl –ether is

Answer

Ethyl alcohol

Answer

Diethyl pether

Answer

Prophyl alcohol

Answer

Butyl alcohol

Question 6

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

Question 7

7. The characteristic reactions of alkanes are

Answer

Substitution reactions

Answer

Condensation reactions

Answer

Polymerization

Answer

Addition reactions

Question 8

8. C₂H₂Cl₂ can show isomerism

Answer

Functional group

Answer

Metamerism

Question 9

9. In C₂H₂ carbon-carbon bond angle is

Question 10

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

Question 11

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

Answer

Tetrahedron

Question 12

12. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 13

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

Question 14

14. Alkanes cannot show cis-trans isomerism

Answer

0¯ bond required less energy to be rotated

Answer

The bond angle is 109.5°

Answer

Alkanes possess three groups attached to each carbon

Answer

0¯ bond is stronger than A-bond

Question 15

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

Answer

Sulphonation

Answer

Alkylation

Question 16

16. 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

Three sigma and one Pi

Answer

One sigma and three Pi

Answer

Two sigma and two Pi

Question 17

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

Answer

None of these

Answer

Homocyclic

Answer

Monocyclic

Answer

Heterocyclic

Question 18

18. Wholer prepared urea from

Question 19

19. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 20

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

Question 21

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

Answer

Para-magnetic

Answer

Un-saturated

Question 22

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

Question 23

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

Answer

Methyl hydrogen sulphate

Answer

Methyl alcohol

Answer

Ethyl hydrogen sulphate

Answer

Ethyl alcohol

Question 24

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

Answer

ClO₂ - angular

Answer

NH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

PH₄⁺ - tetrahedral

Question 25

25. Polythene is a polymer of

Question 26

26. 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 27

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

Answer

Cyclohexanol

Answer

Anthracene

Question 28

28. Which molecule is nonpolar?

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

Stem cracking

Answer

Thermal cracking

Question 30

30. Methane is produced when aluminum carbide is treated with

Question 31

31. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 32

32. The major portion of natural oil is

Question 33

33. 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 34

34. Which one has zero octane number?

Answer

n – Heptane

Answer

n – Hexane

Answer

iso – octane

Question 35

35. Which is the character of organic compounds

Answer

They possess particular properties

Answer

Mostly ionic in character

Answer

Rates of reactions are very fast

Question 36

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

Answer

Domestic use

Answer

Sugar industry

Answer

In glass industry

Answer

Bake bricks

Question 37

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

Answer

Sp³-hybridization

Answer

Dsp²-hybridization

Answer

Sp²-hybridization

Answer

Sp-hybridization

Question 38

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

Answer

Overlap of two s orbitals

Answer

Sidewise overlap of two parallel p orbitals

Answer

Overlap of an s and a p orbital

Answer

Overlap of two p orbitals along their axes

Question 39

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

Question 40

40. In benzene carbon – carbon bonds are

Answer

Of the order 1.5

Answer

3 single and 3 double

Answer

Double covalent

Answer

Single covalent

Question 41

41. Rates of organic reactions are

Answer

None-reactive

Question 42

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

Answer

They form long chain compounds

Answer

They exist in homologous series

Answer

Organic compounds are water soluble

Answer

Organic compound chain compounds

Question 43

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

Answer

H₂O - bent

Answer

AsF₅ - trigonal bipyramidal

Answer

BF₃ - trigonal planar

Answer

NF₃ - trigonal planar

Question 44

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

Answer

None of these

Answer

All except SO₃

Answer

Only HF and OF₂

Question 45

45. Which of the following contains single bonds?

Question 46

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

Question 47

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

Question 48

48. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Tetrahedral

Answer

Triangular

Answer

Square planner

Question 49

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

Question 50

50. 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

Position isomers

Answer

Functional isomers

Question 51

51. The self-linking of carbon atoms is called

Answer

Catenation

Answer

None of these

Question 52

52. The demand of gasoline can be fulfilled by

Answer

Crystallization

Answer

Vapourization

Question 53

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

Answer

2 band pair 2 lone pair

Answer

3 band pair one lone pair

Answer

3 lone pair 1 bond pair

Answer

1 band pair 3 lone pair

Question 54

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

Answer

Metamerism

Answer

Position isomerism

Answer

Chain isomerism

Answer

Functional group isomerism

Question 55

55. Ether shows the phenomenon of

Answer

Chain isomerism

Answer

Cis – trass isomerism

Answer

Position isomerism

Answer

Metamerism

Question 56

56. Choose the species that is incorrectly matched with the electronic geometry about the central atom:

Answer

NO₂¯ - trigonal palnar

Answer

ClO₄¯ - tetrahedral

Answer

ClO₃¯-tetrahedral

Answer

SO₃²¯ - pyramidal

Question 57

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

Question 58

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

Question 59

59. Organic compounds are soluble in all except

Question 60

60. The octane number is 100 for

Answer

Neo-octane

Answer

Neo-Pentane

Question 61

61. Which of the following has linear shape?

Answer

None of these

Question 62

62. Coal is obtained from dead remains of

Answer

Both a and b

Question 63

63. Either show the phenomenon of

Answer

Functional group isomerism

Answer

Position isomerism

Answer

Cis-trans isomerism

Answer

Metamerism

Question 64

64. Which one is not an organic compound

Answer

None of these

Answer

Carbohydrates

Answer 133

None of these

Answer 134

In which atoms of C are in a series

Answer 135

Not in a series

Answer 136

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

Answer 137

Hydrogen sulphides

Answer 138

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

Answer 139

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

Answer 140

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

Answer 141

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

Answer 142

Condensation

Answer 143

Polymerization

Answer 144

Isomerization

Answer 145

Having different M.P.

Answer 146

Having different B.P.

Answer 147

Having different chemical properties

Answer 148

Having different physical states

Answer 149

-CHO group

Answer 150

+NH₂ group

Answer 151

- OH group

Answer 152

-CH₃ group

Answer 153

It is less stable

Answer 154

The molecule is symmetrical around C – C

Answer 155

It is more stable

Answer 156

The molecule is asymmetrical around C – C bond

Answer 157

CaSO₄. 0.5H₂O

Answer 158

(C₆H₁₀O₅)n

Answer 159

C₆H₁₂O₆

Answer 160

The same vapour density

Answer 161

Same molecular weights

Answer 162

Different molecular weights

Answer 163

The same viscosity

Answer 164

Hybrid and un hybrid orbitals

Answer 165

Atomic orbital and hybrid orbital

Answer 166

Un-hybrid orbitals

Answer 167

Hybrid orbitals

Answer 168

Square planer

Answer 169

Tetrahedral

Answer 170

Alkylation

Answer 171

Sulphonation

Answer 172

Dehydrogenation

Answer 173

Dehydration

Answer 174

Natural gas

Answer 175

Reaction with alcoholic KOH

Answer 176

Reaction with aq KOH

Answer 177

Saturated hydrocarbons

Answer 178

Compounds of S

Answer 179

Unsaturated hydrocarbon

Answer 180

Polymerization

Answer 181

Hybridization

Answer 182

Isomerisation

Answer 183

Carbonization

Answer 184

Enantiomers

Answer 185

Positional isomers

Answer 186

Conformers

Answer 187

Diastereomers

Answer 188

Both bonds are broken

Answer 189

None of these

Answer 190

Sigma bond is broken

Answer 191

Pi bond is broken

Answer 192

Having different B.P.

Answer 193

Having different M.P.

Answer 194

Having different chemical properties

Answer 195

Having different physical states

Answer 196

Diethyl ether

Answer 197

Dimethyl ether

Answer 198

Reforming process

Answer 199

Hydrogenation

Answer 200

Functional group

Answer 201

Structural

Answer 202

Ionic complex

Answer 203

Functional group

Answer 204

Homologous series

Answer 205

Chemical bonding

Answer 206

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

Answer 207

Towards the addition reaction alkenes are more reactive than alkynes

Answer 208

Alkenes do not undergo addition reactions

Answer 209

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

Answer 210

Antheracite

Answer 211

All p-orbitals are involved

Answer 212

One s and 3 p-orbitals are involved

Answer 213

One p-orbital is involved

Answer 214

Four p-orbitals are involved

Answer 215

Position isomerism

Answer 216

cis – trans isomerism

Answer 217

Functional group isomerism

Answer 218

Metamerism

Answer 219

SiO₂+Al₂O₃

Answer 220

Ionic properties

Answer 221

Carbon forming long chain or rings

Answer 222

Chemical forces

Answer 223

It is costly

Answer 224

The combustion product, lead causes air pollution

Answer 225

It damages the engine

Answer 226

Pb is difficult to obtain in bulk qualities

Answer 227

Natural gas

Answer 228

May be other atoms

Answer 229

All atoms are SP³ -hybridized

Answer 230

All atoms in the ring are carbon

Answer 231

All atoms are SP² -hybridized

Answer 232

H₂O – tetrahedral

Answer 233

NH₃ - tetrahedral

Answer 234

CF₄ - tetrahedral

Answer 235

PF₃ - pyramidal

Answer 236

Ethanoic acid

Answer 237

Shape and Type of bonding

Answer 238

Type of Bonding

Answer 239

None of these

Answer 240

All of these

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