Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. Hybridization explain the ________ of orbitals

Answer

Shape and Type of bonding

Answer

Type of Bonding

Answer

None of these

Question 2

2. The characteristic reactions of alkanes are

Answer

Addition reactions

Answer

Condensation reactions

Answer

Polymerization

Answer

Substitution reactions

Question 3

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

Answer

Ammonium cyanate

Question 4

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

Answer

Tetrahedron

Question 5

5. Petroleum is mainly a mixture of

Answer

Compounds of S

Answer

Unsaturated hydrocarbon

Answer

Saturated hydrocarbons

Question 6

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

Answer

AsF₅ - trigonal bipyramidal

Answer

H₂O - bent

Answer

NF₃ - trigonal planar

Answer

BF₃ - trigonal planar

Question 7

7. Organic compounds are soluble in all except

Question 8

8. Either show the phenomenon of

Answer

Metamerism

Answer

Functional group isomerism

Answer

Cis-trans isomerism

Answer

Position isomerism

Question 9

9. In C₂H₂ carbon-carbon bond angle is

Question 10

10. Straight chain hydrocarbons are

Answer

None of these

Answer

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

Answer

Not in a series

Answer

In which atoms of C are in a series

Question 11

11. The major portion of natural oil is

Question 12

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

Answer

Cyclohexanol

Answer

Anthracene

Question 13

13. The components of petroleum can be separated due to

Answer

Having different chemical properties

Answer

Having different physical states

Answer

Having different B.P.

Answer

Having different M.P.

Question 14

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

Answer

Sulphonation

Answer

Alkylation

Question 15

15. 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 16

16. Isomerism which is only found in alkanes?

Answer

Metamerism

Answer

cis – trans isomerism

Answer

Position isomerism

Answer

Functional group isomerism

Question 17

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

Answer

Position isomerism

Answer

Metamerism

Answer

Functional group isomerism

Answer

Chain isomerism

Question 18

18. Which one is not an organic compound

Answer

Carbohydrates

Answer

None of these

Question 19

19. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 20

20. Normal by product of cracking is

Answer

All of these

Question 21

21. The carbocyclic compounds are those which have

Answer

All atoms are SP² -hybridized

Answer

All atoms are SP³ -hybridized

Answer

May be other atoms

Answer

All atoms in the ring are carbon

Question 22

22. Which of the following is complex?

Answer

(C₆H₁₀O₅)n

Answer

CaSO₄. 0.5H₂O

Answer

C₆H₁₂O₆

Question 23

23. Wholer prepared urea from

Question 24

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

Answer

The same vapour density

Answer

The same viscosity

Answer

Different molecular weights

Answer

Same molecular weights

Question 25

25. In benzene carbon – carbon bonds are

Answer

Double covalent

Answer

3 single and 3 double

Answer

Single covalent

Answer

Of the order 1.5

Question 26

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

Answer

ClO₄¯ - tetrahedral

Answer

SO₃²¯ - pyramidal

Answer

ClO₃¯-tetrahedral

Answer

NO₂¯ - trigonal palnar

Question 27

27. Which of the following possess linear geometry

Question 28

28. Rates of organic reactions are

Answer

None-reactive

Question 29

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

Question 30

30. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 31

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

Question 32

32. The number of isomers of C₆H₁₄ is:

Question 33

33. 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

Thermal cracking

Answer

Catalytic cracking

Question 34

34. The active part in a molecule is called:

Answer

Ionic complex

Answer

Functional group

Answer

Homologous series

Answer

Chemical bonding

Question 35

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

Question 36

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

Question 37

37. 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 38

38. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 39

39. Which of the following contains single bonds?

Question 40

40. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 41

41. Which is the solid form of petroleum?

Question 42

42. The state of hybridization carbon in ethane is

Question 43

43. 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

Ethyl hydrogen sulphate

Answer

Methyl alcohol

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

Question 46

46. The functional group isomer of dimethyl –ether is

Answer

Diethyl pether

Answer

Butyl alcohol

Answer

Ethyl alcohol

Answer

Prophyl alcohol

Question 47

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

Answer

It damages the engine

Answer

Pb is difficult to obtain in bulk qualities

Answer

The combustion product, lead causes air pollution

Answer

It is costly

Question 48

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

Question 49

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

Answer

Homocyclic

Answer

None of these

Answer

Heterocyclic

Answer

Monocyclic

Question 50

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

Answer

Natural gas

Question 51

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

Answer

Ethyl hydrogen sulphate

Answer

Methyl hydrogen sulphate

Answer

Methyl alcohol

Answer

Ethyl alcohol

Question 52

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

Answer

Hydrogen sulphides

Question 53

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

Question 54

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

Answer

3 band pair one lone pair

Answer

3 lone pair 1 bond pair

Answer

1 band pair 3 lone pair

Answer

2 band pair 2 lone pair

Question 55

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

Question 56

56. 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 57

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

Question 58

58. 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 two p orbitals along their axes

Answer

Overlap of an s and a p orbital

Question 59

59. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 60

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

Question 61

61. Pi bonds are produced by overlapping of

Answer

Atomic orbital and hybrid orbital

Answer

Hybrid orbitals

Answer

Un-hybrid orbitals

Answer

Hybrid and un hybrid orbitals

Question 62

62. 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

Two sigma and two Pi

Answer

Three sigma and one Pi

Answer

One sigma and three Pi

Question 63

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

Answer

-CH₃ group

Answer

- OH group

Answer

+NH₂ group

Answer

-CHO group

Question 64

64. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Answer 136

Positional isomers

Answer 137

Diastereomers

Answer 138

Conformers

Answer 139

Enantiomers

Answer 140

Polymerization

Answer 141

Isomerisation

Answer 142

Carbonization

Answer 143

Hybridization

Answer 144

Position isomers

Answer 145

Functional isomers

Answer 146

Chain isomers

Answer 147

C₂H₂Cl₂

Answer 148

Sp²-hybridization

Answer 149

Sp³-hybridization

Answer 150

Dsp²-hybridization

Answer 151

Sp-hybridization

Answer 152

Crystallization

Answer 153

Vapourization

Answer 154

Structural

Answer 155

Functional group

Answer 156

Sulphonation

Answer 157

Alkylation

Answer 158

None of these

Answer 159

It is more stable

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

Para-magnetic

Answer 164

Un-saturated

Answer 165

Having different M.P.

Answer 166

Having different physical states

Answer 167

Having different chemical properties

Answer 168

Having different B.P.

Answer 169

Antheracite

Answer 170

C and H only

Answer 171

C, H, O and N only

Answer 172

C and S only

Answer 173

C, H, and O only

Answer 174

Both a and b

Answer 175

Hydrogenation

Answer 176

Reforming process

Answer 177

None of these

Answer 178

Only HF and OF₂

Answer 179

All except SO₃

Answer 180

Four p-orbitals are involved

Answer 181

One p-orbital is involved

Answer 182

One s and 3 p-orbitals are involved

Answer 183

All p-orbitals are involved

Answer 184

Ionic properties

Answer 185

Chemical forces

Answer 186

Carbon forming long chain or rings

Answer 187

n – Heptane

Answer 188

iso – octane

Answer 189

n – Hexane

Answer 190

Organic compound chain compounds

Answer 191

They form long chain compounds

Answer 192

They exist in homologous series

Answer 193

Organic compounds are water soluble

Answer 194

Neo-Pentane

Answer 195

Neo-octane

Answer 196

Cis – trass isomerism

Answer 197

Metamerism

Answer 198

Position isomerism

Answer 199

Chain isomerism

Answer 200

Ethanoic acid

Answer 201

Sugar industry

Answer 202

In glass industry

Answer 203

Bake bricks

Answer 204

Domestic use

Answer 205

0¯ bond required less energy to be rotated

Answer 206

0¯ bond is stronger than A-bond

Answer 207

The bond angle is 109.5°

Answer 208

Alkanes possess three groups attached to each carbon

Answer 209

C₁₁H₂₄

Answer 210

C₉H₂₀

Answer 211

C₁₂H₂₆

Answer 212

C₁₃H₂₈

Answer 213

Tetrahedral

Answer 214

Square planer

Answer 215

Dehydrogenation

Answer 216

Dehydration

Answer 217

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

Answer 218

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

Answer 219

Alkenes do not undergo addition reactions

Answer 220

Towards the addition reaction alkenes are more reactive than alkynes

Answer 221

Dimethyl ether

Answer 222

Diethyl ether

Answer 223

Tetrahedral

Answer 224

Square planner

Answer 225

Triangular

Answer 226

Condensation

Answer 227

Isomerization

Answer 228

Polymerization

Answer 229

Linear compounds

Answer 230

Both A and B

Answer 231

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

Answer 232

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

Answer 233

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

Answer 234

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

Answer 235

Metamerism

Answer 236

Functional group

Answer 237

120° only

Answer 238

90° and 180°

Answer 239

45° and 90°

Answer 240

90° and 120°

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