Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. Which is the character of organic compounds

Answer

Mostly ionic in character

Answer

Rates of reactions are very fast

Answer

They possess particular properties

Question 2

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

Answer

Hydrogen sulphides

Question 3

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

Answer

Ethanoic acid

Question 4

4. Petroleum is mainly a mixture of

Answer

Unsaturated hydrocarbon

Answer

Compounds of S

Answer

Saturated hydrocarbons

Question 5

5. Hybridization explain the ________ of orbitals

Answer

Type of Bonding

Answer

None of these

Answer

Shape and Type of bonding

Question 6

6. The essential component of organic compound is

Question 7

7. The functional group isomer of dimethyl –ether is

Answer

Ethyl alcohol

Answer

Prophyl alcohol

Answer

Diethyl pether

Answer

Butyl alcohol

Question 8

8. Methane is produced when aluminum carbide is treated with

Question 9

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

Question 10

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

Answer

None of these

Answer

Sigma bond is broken

Answer

Pi bond is broken

Answer

Both bonds are broken

Question 11

11. Normal by product of cracking is

Answer

All of these

Question 12

12. The components of petroleum can be separated due to

Answer

Having different B.P.

Answer

Having different physical states

Answer

Having different chemical properties

Answer

Having different M.P.

Question 13

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

Answer

Sp²-hybridization

Answer

Sp³-hybridization

Answer

Dsp²-hybridization

Answer

Sp-hybridization

Question 14

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

Answer

None of these

Answer

Monocyclic

Answer

Homocyclic

Answer

Heterocyclic

Question 15

15. The active part in a molecule is called:

Answer

Ionic complex

Answer

Functional group

Answer

Homologous series

Answer

Chemical bonding

Question 16

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

Answer

90° and 120°

Answer

45° and 90°

Answer

120° only

Answer

90° and 180°

Question 17

17. Pi bonds are produced by overlapping of

Answer

Hybrid and un hybrid orbitals

Answer

Hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Un-hybrid orbitals

Question 18

18. Wholer prepared urea from

Question 19

19. Which molecule is nonpolar?

Question 20

20. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 21

21. Hydrocarbons contain

Answer

C and H only

Answer

C, H, O and N only

Answer

C, H, and O only

Answer

C and S only

Question 22

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

Question 23

23. The state of hybridization carbon in ethane is

Question 24

24. The components of petroleum can be separated due to

Answer

Having different M.P.

Answer

Having different B.P.

Answer

Having different physical states

Answer

Having different chemical properties

Question 25

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

Question 26

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

Answer

NH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

ClO₂ - angular

Answer

PH₄⁺ - tetrahedral

Question 27

27. The carbocyclic compounds are those which have

Answer

All atoms in the ring are carbon

Answer

All atoms are SP² -hybridized

Answer

May be other atoms

Answer

All atoms are SP³ -hybridized

Question 28

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

Question 29

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

Answer

Different molecular weights

Answer

Same molecular weights

Answer

The same viscosity

Answer

The same vapour density

Question 30

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

Answer

They form long chain compounds

Answer

Organic compound chain compounds

Answer

Organic compounds are water soluble

Answer

They exist in homologous series

Question 31

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

Question 32

32. The next homologue of C₁₀H₂₂ will be

Answer

C₁₂H₂₆

Answer

C₁₃H₂₈

Answer

C₉H₂₀

Answer

C₁₁H₂₄

Question 33

33. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 34

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

Question 35

35. Ether shows the phenomenon of

Answer

Chain isomerism

Answer

Metamerism

Answer

Cis – trass isomerism

Answer

Position isomerism

Question 36

36. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 37

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

Answer

Conformers

Answer

Diastereomers

Answer

Enantiomers

Answer

Positional isomers

Question 38

38. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Square planner

Answer

Tetrahedral

Answer

Triangular

Question 39

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

Answer

Polymerization

Answer

Condensation

Answer

Isomerization

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

Polymerization

Answer

Hybridization

Answer

Isomerisation

Question 42

42. The demand of gasoline can be fulfilled by

Answer

Vapourization

Answer

Crystallization

Question 43

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

Answer

Sidewise overlap of two parallel p orbitals

Answer

Overlap of two p orbitals along their axes

Answer

Overlap of an s and a p orbital

Answer

Overlap of two s orbitals

Question 44

44. 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

Pb is difficult to obtain in bulk qualities

Answer

The combustion product, lead causes air pollution

Answer

It damages the engine

Question 45

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

Answer

Alkylation

Answer

Sulphonation

Question 46

46. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 47

47. The number of isomers of C₆H₁₄ is:

Question 48

48. 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

Thermal cracking

Answer

Catalytic cracking

Answer

Normal cracking

Answer

Stem cracking

Question 49

49. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 50

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

Answer

NO₂¯ - trigonal palnar

Answer

ClO₃¯-tetrahedral

Answer

SO₃²¯ - pyramidal

Answer

ClO₄¯ - tetrahedral

Question 51

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

Answer

NH₃ - tetrahedral

Answer

PF₃ - pyramidal

Answer

CF₄ - tetrahedral

Answer

H₂O – tetrahedral

Question 52

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

Question 53

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

Question 54

54. C₄H₈ can show isomerism

Answer

Functional group

Answer

Structural

Question 55

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

Question 56

56. In C₂H₂ carbon-carbon bond angle is

Question 57

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

Question 58

58. C₂H₂Cl₂ can show isomerism

Answer

Metamerism

Answer

Functional group

Question 59

59. Acetylene had a characteristic ethereal smell resembling that of

Question 60

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

Answer

Ammonium cyanate

Question 61

61. 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 62

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

Answer

Ethyl alcohol

Answer

Ethyl hydrogen sulphate

Answer

Methyl hydrogen sulphate

Answer

Methyl alcohol

Question 63

63. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 64

64. Polythene is a polymer of

Answer 140

Ethyl hydrogen sulphate

Answer 141

Ethyl alcohol

Answer 142

Methyl hydrogen sulphate

Answer 143

Methyl alcohol

Answer 144

In glass industry

Answer 145

Sugar industry

Answer 146

Bake bricks

Answer 147

Domestic use

Answer 148

One p-orbital is involved

Answer 149

All p-orbitals are involved

Answer 150

Four p-orbitals are involved

Answer 151

One s and 3 p-orbitals are involved

Answer 152

Position isomerism

Answer 153

Cis-trans isomerism

Answer 154

Metamerism

Answer 155

Functional group isomerism

Answer 156

Cyclohexanol

Answer 157

Anthracene

Answer 158

Dehydrogenation

Answer 159

Dehydration

Answer 160

Both a and b

Answer 161

It is less stable

Answer 162

It is more stable

Answer 163

The molecule is asymmetrical around C – C bond

Answer 164

The molecule is symmetrical around C – C

Answer 165

Chain isomers

Answer 166

Position isomers

Answer 167

Functional isomers

Answer 168

Antheracite

Answer 169

C₆H₁₂O₆

Answer 170

(C₆H₁₀O₅)n

Answer 171

CaSO₄. 0.5H₂O

Answer 172

Anthracite

Answer 173

Addition reactions

Answer 174

Polymerization

Answer 175

Substitution reactions

Answer 176

Condensation reactions

Answer 177

None-reactive

Answer 178

Para-magnetic

Answer 179

Un-saturated

Answer 180

Towards the addition reaction alkenes are more reactive than alkynes

Answer 181

Alkenes do not undergo addition reactions

Answer 182

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

Answer 183

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

Answer 184

Functional group isomerism

Answer 185

Position isomerism

Answer 186

cis – trans isomerism

Answer 187

Metamerism

Answer 188

Neo-octane

Answer 189

Neo-Pentane

Answer 190

Carbohydrates

Answer 191

None of these

Answer 192

NF₃ - trigonal planar

Answer 193

BF₃ - trigonal planar

Answer 194

AsF₅ - trigonal bipyramidal

Answer 195

H₂O - bent

Answer 196

Alkanes possess three groups attached to each carbon

Answer 197

0¯ bond is stronger than A-bond

Answer 198

0¯ bond required less energy to be rotated

Answer 199

The bond angle is 109.5°

Answer 200

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

Answer 201

In which atoms of C are in a series

Answer 202

None of these

Answer 203

Not in a series

Answer 204

Chain isomerism

Answer 205

Position isomerism

Answer 206

Metamerism

Answer 207

Functional group isomerism

Answer 208

iso – octane

Answer 209

n – Heptane

Answer 210

n – Hexane

Answer 211

None of these

Answer 212

None of these

Answer 213

Tetrahedron

Answer 214

- OH group

Answer 215

-CH₃ group

Answer 216

-CHO group

Answer 217

+NH₂ group

Answer 218

3 band pair one lone pair

Answer 219

2 band pair 2 lone pair

Answer 220

3 lone pair 1 bond pair

Answer 221

1 band pair 3 lone pair

Answer 222

C₂H₂Cl₂

Answer 223

Ionic properties

Answer 224

Chemical forces

Answer 225

Carbon forming long chain or rings

Answer 226

None of these

Answer 227

Only HF and OF₂

Answer 228

All except SO₃

Answer 229

Single covalent

Answer 230

Double covalent

Answer 231

Of the order 1.5

Answer 232

3 single and 3 double

Answer 233

Reforming process

Answer 234

Hydrogenation

Answer 235

Alkylation

Answer 236

Sulphonation

Answer 237

Square planer

Answer 238

Tetrahedral

Answer 239

Natural gas

Answer 240

Natural gas

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