Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. Which of the following has linear shape?

Answer

None of these

Question 2

2. 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

Three sigma and one Pi

Answer

Two sigma and two Pi

Question 3

3. Either show the phenomenon of

Answer

Functional group isomerism

Answer

Cis-trans isomerism

Answer

Position isomerism

Answer

Metamerism

Question 4

4. Polythene is a polymer of

Question 5

5. Acetylene had a characteristic ethereal smell resembling that of

Question 6

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

Answer

The molecule is symmetrical around C – C

Answer

It is less stable

Answer

It is more stable

Answer

The molecule is asymmetrical around C – C bond

Question 7

7. Vital force theory was rejected by

Question 8

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

Answer

ClO₄¯ - tetrahedral

Answer

NO₂¯ - trigonal palnar

Answer

SO₃²¯ - pyramidal

Answer

ClO₃¯-tetrahedral

Question 9

9. The active part in a molecule is called:

Answer

Ionic complex

Answer

Homologous series

Answer

Chemical bonding

Answer

Functional group

Question 10

10. Which one has zero octane number?

Answer

n – Hexane

Answer

n – Heptane

Answer

iso – octane

Question 11

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

Answer

Carbonization

Answer

Hybridization

Answer

Isomerisation

Answer

Polymerization

Question 12

12. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 13

13. The number of isomers of C₆H₁₄ is:

Question 14

14. Coal is obtained from dead remains of

Answer

Both a and b

Question 15

15. In C₂H₂ carbon-carbon bond angle is

Question 16

16. The use of tetra ethyl lead in petrol as an efficient antiknock agent is being discouraged. Which reason is correct?

Answer

It is costly

Answer

The combustion product, lead causes air pollution

Answer

Pb is difficult to obtain in bulk qualities

Answer

It damages the engine

Question 17

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

Answer

Different molecular weights

Answer

The same viscosity

Answer

Same molecular weights

Answer

The same vapour density

Question 18

18. Wholer prepared urea from

Question 19

19. Methane is produced when aluminum carbide is treated with

Question 20

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

Answer

Ammonium cyanate

Question 21

21. The carbocyclic compounds are those which have

Answer

All atoms are SP² -hybridized

Answer

May be other atoms

Answer

All atoms are SP³ -hybridized

Answer

All atoms in the ring are carbon

Question 22

22. Isomerism which is only found in alkanes?

Answer

Position isomerism

Answer

cis – trans isomerism

Answer

Metamerism

Answer

Functional group isomerism

Question 23

23. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 24

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

Answer

Sulphonation

Answer

Alkylation

Question 25

25. Straight chain hydrocarbons are

Answer

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

Answer

None of these

Answer

Not in a series

Answer

In which atoms of C are in a series

Question 26

26. The state of hybridization carbon in ethane is

Question 27

27. C₄H₈ can show isomerism

Answer

Structural

Answer

Functional group

Question 28

28. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 29

29. Organic compounds are soluble in all except

Question 30

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

Question 31

31. Alkanes cannot show cis-trans isomerism

Answer

Alkanes possess three groups attached to each carbon

Answer

0¯ bond is stronger than A-bond

Answer

The bond angle is 109.5°

Answer

0¯ bond required less energy to be rotated

Question 32

32. Ether shows the phenomenon of

Answer

Metamerism

Answer

Cis – trass isomerism

Answer

Position isomerism

Answer

Chain isomerism

Question 33

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

Question 34

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

Answer

H₂O – tetrahedral

Answer

NH₃ - tetrahedral

Answer

PF₃ - pyramidal

Answer

CF₄ - tetrahedral

Question 35

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

Answer

Tetrahedron

Question 36

36. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Tetrahedral

Answer

Square planner

Answer

Triangular

Question 37

37. The demand of gasoline can be fulfilled by

Answer

Vapourization

Answer

Crystallization

Question 38

38. Which statement is true regarding reactivity?

Answer

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

Answer

Alkenes do not undergo addition reactions

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

Question 39

39. 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 40

40. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 41

41. Rates of organic reactions are

Answer

None-reactive

Question 42

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

Question 43

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

Answer

Antheracite

Question 44

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

Answer

BF₃ - trigonal planar

Answer

NF₃ - trigonal planar

Answer

H₂O - bent

Answer

AsF₅ - trigonal bipyramidal

Question 45

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

Answer

Natural gas

Question 46

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

Answer

ClO₂ - angular

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

PH₄⁺ - tetrahedral

Answer

NH₄⁺ - tetrahedral

Question 47

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

Answer

Bake bricks

Answer

In glass industry

Answer

Domestic use

Answer

Sugar industry

Question 48

48. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 49

49. The components of petroleum can be separated due to

Answer

Having different physical states

Answer

Having different B.P.

Answer

Having different chemical properties

Answer

Having different M.P.

Question 50

50. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 51

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

Question 52

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

Question 53

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

Question 54

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

Answer

Reforming process

Answer

Hydrogenation

Question 55

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

Answer

Anthracene

Answer

Cyclohexanol

Question 56

56. 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

1 band pair 3 lone pair

Answer

2 band pair 2 lone pair

Question 57

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

Question 58

58. Which molecule is nonpolar?

Question 59

59. The next homologue of C₁₀H₂₂ will be

Answer

C₉H₂₀

Answer

C₁₃H₂₈

Answer

C₁₁H₂₄

Answer

C₁₂H₂₆

Question 60

60. Ethyl alcohol on ____________ gives ethane

Answer

Dehydrogenation

Answer

Dehydration

Question 61

61. In benzene carbon – carbon bonds are

Answer

Of the order 1.5

Answer

Single covalent

Answer

3 single and 3 double

Answer

Double covalent

Question 62

62. 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 63

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

Question 64

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

Answer

Hydrogen sulphides

Answer 133

Mostly ionic in character

Answer 134

Rates of reactions are very fast

Answer 135

They possess particular properties

Answer 136

Prophyl alcohol

Answer 137

Ethyl alcohol

Answer 138

Diethyl pether

Answer 139

Butyl alcohol

Answer 140

Metamerism

Answer 141

Functional group

Answer 142

90° and 180°

Answer 143

120° only

Answer 144

90° and 120°

Answer 145

45° and 90°

Answer 146

Diastereomers

Answer 147

Conformers

Answer 148

Positional isomers

Answer 149

Enantiomers

Answer 150

Organic compound chain compounds

Answer 151

They form long chain compounds

Answer 152

Organic compounds are water soluble

Answer 153

They exist in homologous series

Answer 154

Catalytic cracking

Answer 155

Stem cracking

Answer 156

Thermal cracking

Answer 157

Normal cracking

Answer 158

All of these

Answer 159

Sp²-hybridization

Answer 160

Sp-hybridization

Answer 161

Dsp²-hybridization

Answer 162

Sp³-hybridization

Answer 163

Ethyl hydrogen sulphate

Answer 164

Methyl alcohol

Answer 165

Methyl hydrogen sulphate

Answer 166

Ethyl alcohol

Answer 167

Isomerization

Answer 168

Condensation

Answer 169

Polymerization

Answer 170

Alkylation

Answer 171

Sulphonation

Answer 172

Four p-orbitals are involved

Answer 173

One s and 3 p-orbitals are involved

Answer 174

One p-orbital is involved

Answer 175

All p-orbitals are involved

Answer 176

-CHO group

Answer 177

- OH group

Answer 178

+NH₂ group

Answer 179

-CH₃ group

Answer 180

Un-hybrid orbitals

Answer 181

Atomic orbital and hybrid orbital

Answer 182

Hybrid orbitals

Answer 183

Hybrid and un hybrid orbitals

Answer 184

Linear compounds

Answer 185

Both A and B

Answer 186

Dimethyl ether

Answer 187

Diethyl ether

Answer 188

Natural gas

Answer 189

Having different B.P.

Answer 190

Having different M.P.

Answer 191

Having different physical states

Answer 192

Having different chemical properties

Answer 193

SiO₂+Al₂O₃

Answer 194

None of these

Answer 195

Carbohydrates

Answer 196

Methyl alcohol

Answer 197

Methyl hydrogen sulphate

Answer 198

Ethyl hydrogen sulphate

Answer 199

Ethyl alcohol

Answer 200

Carbon forming long chain or rings

Answer 201

Ionic properties

Answer 202

Chemical forces

Answer 203

Para-magnetic

Answer 204

Un-saturated

Answer 205

C and H only

Answer 206

C and S only

Answer 207

C, H, O and N only

Answer 208

C, H, and O only

Answer 209

None of these

Answer 210

Polymerization

Answer 211

Condensation reactions

Answer 212

Substitution reactions

Answer 213

Addition reactions

Answer 214

Monocyclic

Answer 215

Heterocyclic

Answer 216

Homocyclic

Answer 217

None of these

Answer 218

CaSO₄. 0.5H₂O

Answer 219

C₆H₁₂O₆

Answer 220

(C₆H₁₀O₅)n

Answer 221

Ethanoic acid

Answer 222

None of these

Answer 223

Sigma bond is broken

Answer 224

Both bonds are broken

Answer 225

Pi bond is broken

Answer 226

Anthracite

Answer 227

Sidewise overlap of two parallel p orbitals

Answer 228

Overlap of two p orbitals along their axes

Answer 229

Overlap of two s orbitals

Answer 230

Overlap of an s and a p orbital

Answer 231

Saturated hydrocarbons

Answer 232

Unsaturated hydrocarbon

Answer 233

Compounds of S

Answer 234

Position isomerism

Answer 235

Metamerism

Answer 236

Functional group isomerism

Answer 237

Chain isomerism

Answer 238

None of these

Answer 239

Shape and Type of bonding

Answer 240

Type of Bonding

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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