Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Question 2

2. Ethyl alcohol on ____________ gives ethane

Answer

Dehydration

Answer

Dehydrogenation

Question 3

3. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 4

4. Which is the solid form of petroleum?

Question 5

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

Question 6

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

Answer

Antheracite

Question 7

7. Normal by product of cracking is

Answer

All of these

Question 8

8. C₂H₂Cl₂ can show isomerism

Answer

Functional group

Answer

Metamerism

Question 9

9. Acetylene had a characteristic ethereal smell resembling that of

Question 10

10. Isomerism which is only found in alkanes?

Answer

Position isomerism

Answer

cis – trans isomerism

Answer

Functional group isomerism

Answer

Metamerism

Question 11

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

Answer

Anthracene

Answer

Cyclohexanol

Question 12

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

Answer

They form long chain compounds

Answer

Organic compound chain compounds

Answer

They exist in homologous series

Answer

Organic compounds are water soluble

Question 13

13. The components of petroleum can be separated due to

Answer

Having different B.P.

Answer

Having different M.P.

Answer

Having different physical states

Answer

Having different chemical properties

Question 14

14. Ether shows the phenomenon of

Answer

Metamerism

Answer

Position isomerism

Answer

Cis – trass isomerism

Answer

Chain isomerism

Question 15

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

Answer

Functional group isomerism

Answer

Position isomerism

Answer

Metamerism

Answer

Chain isomerism

Question 16

16. Metallic ethynides are formed by the reaction of ________ with ammonical solver nitrate or ammonical cuprous chloride

Answer

Ethanoic acid

Question 17

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

Answer

Enantiomers

Answer

Conformers

Answer

Diastereomers

Answer

Positional isomers

Question 18

18. The essential component of organic compound is

Question 19

19. Vital force theory was rejected by

Question 20

20. Either show the phenomenon of

Answer

Functional group isomerism

Answer

Metamerism

Answer

Position isomerism

Answer

Cis-trans isomerism

Question 21

21. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 22

22. In C₂H₂ carbon-carbon bond angle is

Question 23

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

Answer

Tetrahedron

Question 24

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

Question 25

25. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 26

26. 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 27

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

Answer

Pi bond is broken

Answer

Sigma bond is broken

Answer

Both bonds are broken

Answer

None of these

Question 28

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

Answer

Alkylation

Answer

Sulphonation

Question 29

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

Answer

SO₃²¯ - pyramidal

Answer

NO₂¯ - trigonal palnar

Answer

ClO₄¯ - tetrahedral

Answer

ClO₃¯-tetrahedral

Question 30

30. The carbocyclic compounds are those which have

Answer

All atoms in the ring are carbon

Answer

May be other atoms

Answer

All atoms are SP² -hybridized

Answer

All atoms are SP³ -hybridized

Question 31

31. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 32

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

Answer

NH₃ - tetrahedral

Answer

PF₃ - pyramidal

Answer

H₂O – tetrahedral

Answer

CF₄ - tetrahedral

Question 33

33. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 34

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

Question 35

35. Petroleum is mainly a mixture of

Answer

Unsaturated hydrocarbon

Answer

Compounds of S

Answer

Saturated hydrocarbons

Question 36

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

Answer

Isomerisation

Answer

Polymerization

Answer

Hybridization

Answer

Carbonization

Question 37

37. 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 38

38. Which one has zero octane number?

Answer

n – Hexane

Answer

n – Heptane

Answer

iso – octane

Question 39

39. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 40

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

Question 41

41. The characteristic reactions of alkanes are

Answer

Addition reactions

Answer

Condensation reactions

Answer

Substitution reactions

Answer

Polymerization

Question 42

42. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 43

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

Answer

The molecule is asymmetrical around C – C bond

Answer

The molecule is symmetrical around C – C

Answer

It is more stable

Answer

It is less stable

Question 44

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

Question 45

45. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 46

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

Question 47

47. The active part in a molecule is called:

Answer

Chemical bonding

Answer

Homologous series

Answer

Ionic complex

Answer

Functional group

Question 48

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

Answer

Ammonium cyanate

Question 49

49. The next homologue of C₁₀H₂₂ will be

Answer

C₁₂H₂₆

Answer

C₁₁H₂₄

Answer

C₁₃H₂₈

Answer

C₉H₂₀

Question 50

50. The open chain organic compounds are called

Answer

Linear compounds

Answer

Both A and B

Question 51

51. The functional group isomer of dimethyl –ether is

Answer

Diethyl pether

Answer

Ethyl alcohol

Answer

Butyl alcohol

Answer

Prophyl alcohol

Question 52

52. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 53

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

Question 54

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

Answer

AsF₅ - trigonal bipyramidal

Answer

BF₃ - trigonal planar

Answer

H₂O - bent

Answer

NF₃ - trigonal planar

Question 55

55. Which statement is true regarding reactivity?

Answer

Towards the addition reaction alkenes are more reactive than alkynes

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

Question 56

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

Answer

Different molecular weights

Answer

The same vapour density

Answer

The same viscosity

Answer

Same molecular weights

Question 57

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

Question 58

58. Alkanes cannot show cis-trans isomerism

Answer

0¯ bond is stronger than A-bond

Answer

The bond angle is 109.5°

Answer

0¯ bond required less energy to be rotated

Answer

Alkanes possess three groups attached to each carbon

Question 59

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

Answer

Un-saturated

Answer

Para-magnetic

Question 60

60. The octane number is 100 for

Answer

Neo-octane

Answer

Neo-Pentane

Question 61

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

Answer

Hydrogenation

Answer

Reforming process

Question 62

62. Coal is obtained from dead remains of

Answer

Both a and b

Question 63

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

Question 64

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

Answer

Ethyl hydrogen sulphate

Answer

Ethyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Methyl alcohol

Answer 135

Rates of reactions are very fast

Answer 136

Mostly ionic in character

Answer 137

They possess particular properties

Answer 138

- OH group

Answer 139

-CHO group

Answer 140

-CH₃ group

Answer 141

+NH₂ group

Answer 142

Alkylation

Answer 143

Sulphonation

Answer 144

Position isomers

Answer 145

Functional isomers

Answer 146

Chain isomers

Answer 147

Overlap of two p orbitals along their axes

Answer 148

Sidewise overlap of two parallel p orbitals

Answer 149

Overlap of an s and a p orbital

Answer 150

Overlap of two s orbitals

Answer 151

Crystallization

Answer 152

Vapourization

Answer 153

45° and 90°

Answer 154

90° and 180°

Answer 155

90° and 120°

Answer 156

120° only

Answer 157

None of these

Answer 158

Not in a series

Answer 159

In which atoms of C are in a series

Answer 160

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

Answer 161

Stem cracking

Answer 162

Normal cracking

Answer 163

Catalytic cracking

Answer 164

Thermal cracking

Answer 165

Hydrogen sulphides

Answer 166

Carbohydrates

Answer 167

None of these

Answer 168

Only HF and OF₂

Answer 169

All except SO₃

Answer 170

None of these

Answer 171

None-reactive

Answer 172

Sp²-hybridization

Answer 173

Dsp²-hybridization

Answer 174

Sp-hybridization

Answer 175

Sp³-hybridization

Answer 176

Of the order 1.5

Answer 177

Single covalent

Answer 178

3 single and 3 double

Answer 179

Double covalent

Answer 180

(C₆H₁₀O₅)n

Answer 181

C₆H₁₂O₆

Answer 182

CaSO₄. 0.5H₂O

Answer 183

NH₄⁺ - tetrahedral

Answer 184

PH₄⁺ - tetrahedral

Answer 185

SiCl₆²¯ -trigonal bipyramidal

Answer 186

ClO₂ - angular

Answer 187

Condensation

Answer 188

Isomerization

Answer 189

Polymerization

Answer 190

Natural gas

Answer 191

C and S only

Answer 192

C and H only

Answer 193

C, H, O and N only

Answer 194

C, H, and O only

Answer 195

It damages the engine

Answer 196

It is costly

Answer 197

Pb is difficult to obtain in bulk qualities

Answer 198

The combustion product, lead causes air pollution

Answer 199

One p-orbital is involved

Answer 200

Four p-orbitals are involved

Answer 201

All p-orbitals are involved

Answer 202

One s and 3 p-orbitals are involved

Answer 203

None of these

Answer 204

Type of Bonding

Answer 205

Shape and Type of bonding

Answer 206

Homocyclic

Answer 207

None of these

Answer 208

Heterocyclic

Answer 209

Monocyclic

Answer 210

Hybrid orbitals

Answer 211

Un-hybrid orbitals

Answer 212

Atomic orbital and hybrid orbital

Answer 213

Hybrid and un hybrid orbitals

Answer 214

Bake bricks

Answer 215

Sugar industry

Answer 216

Domestic use

Answer 217

In glass industry

Answer 218

Triangular

Answer 219

Tetrahedral

Answer 220

Square planner

Answer 221

Functional group

Answer 222

Structural

Answer 223

Diethyl ether

Answer 224

Dimethyl ether

Answer 225

None of these

Answer 226

Carbon forming long chain or rings

Answer 227

Ionic properties

Answer 228

Chemical forces

Answer 229

Ethyl hydrogen sulphate

Answer 230

Ethyl alcohol

Answer 231

Methyl hydrogen sulphate

Answer 232

Methyl alcohol

Answer 233

Having different B.P.

Answer 234

Having different physical states

Answer 235

Having different M.P.

Answer 236

Having different chemical properties

Answer 237

3 band pair one lone pair

Answer 238

2 band pair 2 lone pair

Answer 239

3 lone pair 1 bond pair

Answer 240

1 band pair 3 lone pair

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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