Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Question 2

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

Answer

Enantiomers

Answer

Conformers

Answer

Positional isomers

Answer

Diastereomers

Question 3

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

Question 4

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

Question 5

5. Rates of organic reactions are

Answer

None-reactive

Question 6

6. The major portion of natural oil is

Question 7

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

Answer

Hydrogen sulphides

Question 8

8. The structure of benzene is

Answer

Tetrahedral

Answer

Square planer

Question 9

9. 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 10

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

Answer

Natural gas

Question 11

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

Answer

3 band pair one lone pair

Answer

2 band pair 2 lone pair

Answer

1 band pair 3 lone pair

Answer

3 lone pair 1 bond pair

Question 12

12. Alkanes cannot show cis-trans isomerism

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

Answer

The bond angle is 109.5°

Question 13

13. Which of the following is complex?

Answer

(C₆H₁₀O₅)n

Answer

C₆H₁₂O₆

Answer

CaSO₄. 0.5H₂O

Question 14

14. 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

It damages the engine

Answer

Pb is difficult to obtain in bulk qualities

Question 15

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

Question 16

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

Answer

Para-magnetic

Answer

Un-saturated

Question 17

17. In benzene carbon – carbon bonds are

Answer

Double covalent

Answer

Of the order 1.5

Answer

3 single and 3 double

Answer

Single covalent

Question 18

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

Answer

45° and 90°

Answer

120° only

Answer

90° and 120°

Answer

90° and 180°

Question 19

19. Polythene is a polymer of

Question 20

20. 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 21

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

Answer

Ethyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Methyl alcohol

Answer

Ethyl hydrogen sulphate

Question 22

22. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 23

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

Answer

Sulphonation

Answer

Alkylation

Question 24

24. C₂H₂Cl₂ can show isomerism

Answer

Metamerism

Answer

Functional group

Question 25

25. The components of petroleum can be separated due to

Answer

Having different B.P.

Answer

Having different chemical properties

Answer

Having different M.P.

Answer

Having different physical states

Question 26

26. Organic compounds resemble to those of inorganic compounds having same

Answer

Chemical forces

Answer

Ionic properties

Answer

Carbon forming long chain or rings

Question 27

27. Bromoethane can be converted to ethane by

Answer

Reaction with alcoholic KOH

Answer

Reaction with aq KOH

Question 28

28. Hydrocarbons contain

Answer

C, H, and O only

Answer

C, H, O and N only

Answer

C and H only

Answer

C and S only

Question 29

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

Question 30

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

Question 31

31. 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

Position isomers

Answer

Functional isomers

Answer

Chain isomers

Question 32

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

Answer

Cyclohexanol

Answer

Anthracene

Question 33

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

Question 34

34. The state of hybridization carbon in ethane is

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

Stem cracking

Answer

Normal cracking

Answer

Catalytic cracking

Answer

Thermal cracking

Question 36

36. Which of the following has linear shape?

Answer

None of these

Question 37

37. Unsaturated hydrocarbons containing a double bond are called

Question 38

38. The next homologue of C₁₀H₂₂ will be

Answer

C₁₁H₂₄

Answer

C₁₃H₂₈

Answer

C₁₂H₂₆

Answer

C₉H₂₀

Question 39

39. On sp3 hybridization

Answer

All p-orbitals are involved

Answer

One p-orbital is involved

Answer

Four p-orbitals are involved

Answer

One s and 3 p-orbitals are involved

Question 40

40. Which of the following possess linear geometry

Question 41

41. 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

Polymerization

Answer

Isomerisation

Question 42

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

Answer

Alkylation

Answer

Sulphonation

Question 43

43. The open chain organic compounds are called

Answer

Linear compounds

Answer

Both A and B

Question 44

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

Answer

PH₄⁺ - tetrahedral

Answer

ClO₂ - angular

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

NH₄⁺ - tetrahedral

Question 45

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

Answer

Monocyclic

Answer

Heterocyclic

Answer

None of these

Answer

Homocyclic

Question 46

46. Ethyl alcohol on ____________ gives ethane

Answer

Dehydrogenation

Answer

Dehydration

Question 47

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

Answer

Organic compound chain compounds

Answer

They form long chain compounds

Answer

Organic compounds are water soluble

Answer

They exist in homologous series

Question 48

48. Which of the following species is planar?

Question 49

49. The number of isomers of C₆H₁₄ is:

Question 50

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

Answer

Methyl hydrogen sulphate

Answer

Methyl alcohol

Answer

Ethyl alcohol

Answer

Ethyl hydrogen sulphate

Question 51

51. Which molecule is nonpolar?

Question 52

52. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 53

53. 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 54

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

Question 55

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

Answer

Dsp²-hybridization

Answer

Sp²-hybridization

Answer

Sp-hybridization

Answer

Sp³-hybridization

Question 56

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

Answer

- OH group

Answer

-CH₃ group

Answer

-CHO group

Answer

+NH₂ group

Question 57

57. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 58

58. The essential component of organic compound is

Question 59

59. The carbocyclic compounds are those which have

Answer

All atoms in the ring are carbon

Answer

All atoms are SP³ -hybridized

Answer

All atoms are SP² -hybridized

Answer

May be other atoms

Question 60

60. 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 61

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

Question 62

62. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 63

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

Question 64

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

Answer

SO₃²¯ - pyramidal

Answer

ClO₃¯-tetrahedral

Answer

ClO₄¯ - tetrahedral

Answer

NO₂¯ - trigonal palnar

Answer 133

Ethanoic acid

Answer 134

Un-hybrid orbitals

Answer 135

Hybrid orbitals

Answer 136

Hybrid and un hybrid orbitals

Answer 137

Atomic orbital and hybrid orbital

Answer 138

Vapourization

Answer 139

Crystallization

Answer 140

Unsaturated hydrocarbon

Answer 141

Compounds of S

Answer 142

Saturated hydrocarbons

Answer 143

Structural

Answer 144

Functional group

Answer 145

Only HF and OF₂

Answer 146

All except SO₃

Answer 147

None of these

Answer 148

CF₄ - tetrahedral

Answer 149

PF₃ - pyramidal

Answer 150

NH₃ - tetrahedral

Answer 151

H₂O – tetrahedral

Answer 152

H₂O - bent

Answer 153

AsF₅ - trigonal bipyramidal

Answer 154

BF₃ - trigonal planar

Answer 155

NF₃ - trigonal planar

Answer 156

In glass industry

Answer 157

Domestic use

Answer 158

Bake bricks

Answer 159

Sugar industry

Answer 160

The molecule is symmetrical around C – C

Answer 161

It is less stable

Answer 162

The molecule is asymmetrical around C – C bond

Answer 163

It is more stable

Answer 164

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

Answer 165

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

Answer 166

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

Answer 167

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

Answer 168

Type of Bonding

Answer 169

None of these

Answer 170

Shape and Type of bonding

Answer 171

Isomerization

Answer 172

Condensation

Answer 173

Polymerization

Answer 174

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

Answer 175

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

Answer 176

Alkenes do not undergo addition reactions

Answer 177

Towards the addition reaction alkenes are more reactive than alkynes

Answer 178

Ammonium cyanate

Answer 179

Triangular

Answer 180

Square planner

Answer 181

Tetrahedral

Answer 182

Functional group isomerism

Answer 183

Cis-trans isomerism

Answer 184

Metamerism

Answer 185

Position isomerism

Answer 186

Metamerism

Answer 187

cis – trans isomerism

Answer 188

Position isomerism

Answer 189

Functional group isomerism

Answer 190

In which atoms of C are in a series

Answer 191

None of these

Answer 192

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

Answer 193

Not in a series

Answer 194

Chain isomerism

Answer 195

Metamerism

Answer 196

Position isomerism

Answer 197

Cis – trass isomerism

Answer 198

Polymerization

Answer 199

Addition reactions

Answer 200

Condensation reactions

Answer 201

Substitution reactions

Answer 202

C₂H₂Cl₂

Answer 203

Tetrahedron

Answer 204

None of these

Answer 205

Catenation

Answer 206

Hydrogenation

Answer 207

Reforming process

Answer 208

All of these

Answer 209

Antheracite

Answer 210

n – Heptane

Answer 211

iso – octane

Answer 212

n – Hexane

Answer 213

None of these

Answer 214

Pi bond is broken

Answer 215

Both bonds are broken

Answer 216

Sigma bond is broken

Answer 217

None of these

Answer 218

Carbohydrates

Answer 219

Metamerism

Answer 220

Chain isomerism

Answer 221

Functional group isomerism

Answer 222

Position isomerism

Answer 223

Natural gas

Answer 224

Both a and b

Answer 225

Two sigma and two Pi

Answer 226

Three sigma and one Pi

Answer 227

One sigma and three Pi

Answer 228

Butyl alcohol

Answer 229

Ethyl alcohol

Answer 230

Diethyl pether

Answer 231

Prophyl alcohol

Answer 232

Overlap of an s and a p orbital

Answer 233

Sidewise overlap of two parallel p orbitals

Answer 234

Overlap of two s orbitals

Answer 235

Overlap of two p orbitals along their axes

Answer 236

SiO₂+Al₂O₃

Answer 237

Homologous series

Answer 238

Ionic complex

Answer 239

Chemical bonding

Answer 240

Functional group

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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