Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. The structure of benzene is

Answer

Tetrahedral

Answer

Square planer

Question 2

2. 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 3

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

Answer

Carbon forming long chain or rings

Answer

Ionic properties

Answer

Chemical forces

Question 4

4. 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 hydrogen sulphate

Answer

Ethyl alcohol

Question 5

5. 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 6

6. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 7

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

Question 8

8. 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 9

9. Coal is obtained from dead remains of

Answer

Both a and b

Question 10

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

Question 11

11. Alkanes cannot show cis-trans isomerism

Answer

0¯ bond required less energy to be rotated

Answer

The bond angle is 109.5°

Answer

Alkanes possess three groups attached to each carbon

Answer

0¯ bond is stronger than A-bond

Question 12

12. The carbocyclic compounds are those which have

Answer

All atoms are SP³ -hybridized

Answer

All atoms are SP² -hybridized

Answer

May be other atoms

Answer

All atoms in the ring are carbon

Question 13

13. Which of the following contains single bonds?

Question 14

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

Answer

Ethanoic acid

Question 15

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

Question 16

16. 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

Normal cracking

Answer

Catalytic cracking

Answer

Thermal cracking

Answer

Stem cracking

Question 17

17. In benzene carbon – carbon bonds are

Answer

3 single and 3 double

Answer

Single covalent

Answer

Double covalent

Answer

Of the order 1.5

Question 18

18. Bromoethane can be converted to ethane by

Answer

Reaction with alcoholic KOH

Answer

Reaction with aq KOH

Question 19

19. 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 20

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

Answer

Tetrahedron

Question 21

21. Petroleum is mainly a mixture of

Answer

Saturated hydrocarbons

Answer

Compounds of S

Answer

Unsaturated hydrocarbon

Question 22

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

Answer

Condensation

Answer

Polymerization

Answer

Isomerization

Question 23

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

Answer

Sulphonation

Answer

Alkylation

Question 24

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

Answer

Para-magnetic

Answer

Un-saturated

Question 25

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

Answer

The same viscosity

Answer

Different molecular weights

Answer

The same vapour density

Answer

Same molecular weights

Question 26

26. Which of the following four molecules are polar: PH₃ OF₂ HF SO₃?

Answer

None of these

Answer

All except SO₃

Answer

Only HF and OF₂

Question 27

27. Which is the solid form of petroleum?

Question 28

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

Answer

+NH₂ group

Answer

-CHO group

Answer

-CH₃ group

Answer

- OH group

Question 29

29. 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

Chain isomers

Answer

Position isomers

Answer

Functional isomers

Question 30

30. 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

Question 31

31. The active part in a molecule is called:

Answer

Homologous series

Answer

Chemical bonding

Answer

Ionic complex

Answer

Functional group

Question 32

32. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 33

33. Which of the following possess linear geometry

Question 34

34. Unsaturated hydrocarbons containing a double bond are called

Question 35

35. Hybridization explain the ________ of orbitals

Answer

Type of Bonding

Answer

None of these

Answer

Shape and Type of bonding

Question 36

36. In C₂H₂ carbon-carbon bond angle is

Question 37

37. Isomerism which is only found in alkanes?

Answer

Metamerism

Answer

Functional group isomerism

Answer

cis – trans isomerism

Answer

Position isomerism

Question 38

38. The demand of gasoline can be fulfilled by

Answer

Crystallization

Answer

Vapourization

Question 39

39. Straight chain hydrocarbons are

Answer

In which atoms of C are in a series

Answer

None of these

Answer

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

Answer

Not in a series

Question 40

40. Which of the following is complex?

Answer

(C₆H₁₀O₅)n

Answer

C₆H₁₂O₆

Answer

CaSO₄. 0.5H₂O

Question 41

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

Answer

AsF₅ - trigonal bipyramidal

Answer

NF₃ - trigonal planar

Answer

BF₃ - trigonal planar

Answer

H₂O - bent

Question 42

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

Answer

Antheracite

Question 43

43. Acetylene had a characteristic ethereal smell resembling that of

Question 44

44. Which of the following has linear shape?

Answer

None of these

Question 45

45. Which molecule is nonpolar?

Question 46

46. Normal by product of cracking is

Answer

All of these

Question 47

47. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 48

48. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 49

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

Question 50

50. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 51

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

Question 52

52. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 53

53. 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 54

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

Question 55

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

Answer

Natural gas

Question 56

56. Hydrocarbons contain

Answer

C, H, and O only

Answer

C, H, O and N only

Answer

C and S only

Answer

C and H only

Question 57

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

Answer

The combustion product, lead causes air pollution

Answer

Pb is difficult to obtain in bulk qualities

Answer

It damages the engine

Answer

It is costly

Question 58

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

Answer

Hydrogen sulphides

Question 59

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

Question 60

60. Wholer prepared urea from

Question 61

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

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

One sigma and three Pi

Answer

Three sigma and one Pi

Question 63

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

Question 64

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

Answer

CF₄ - tetrahedral

Answer

H₂O – tetrahedral

Answer

PF₃ - pyramidal

Answer

NH₃ - tetrahedral

Answer 127

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

Answer 128

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

Answer 129

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

Answer 130

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

Answer 131

Sulphonation

Answer 132

Alkylation

Answer 133

None of these

Answer 134

Homocyclic

Answer 135

Monocyclic

Answer 136

Heterocyclic

Answer 137

Position isomerism

Answer 138

Cis – trass isomerism

Answer 139

Metamerism

Answer 140

Chain isomerism

Answer 141

Prophyl alcohol

Answer 142

Ethyl alcohol

Answer 143

Butyl alcohol

Answer 144

Diethyl pether

Answer 145

Carbonization

Answer 146

Polymerization

Answer 147

Isomerisation

Answer 148

Hybridization

Answer 149

Ammonium cyanate

Answer 150

Functional group

Answer 151

Structural

Answer 152

Hybrid and un hybrid orbitals

Answer 153

Hybrid orbitals

Answer 154

Atomic orbital and hybrid orbital

Answer 155

Un-hybrid orbitals

Answer 156

Tetrahedral

Answer 157

Triangular

Answer 158

Square planner

Answer 159

C₉H₂₀

Answer 160

C₁₃H₂₈

Answer 161

C₁₂H₂₆

Answer 162

C₁₁H₂₄

Answer 163

Metamerism

Answer 164

Functional group

Answer 165

None-reactive

Answer 166

Anthracene

Answer 167

Cyclohexanol

Answer 168

Having different B.P.

Answer 169

Having different physical states

Answer 170

Having different chemical properties

Answer 171

Having different M.P.

Answer 172

Dsp²-hybridization

Answer 173

Sp-hybridization

Answer 174

Sp²-hybridization

Answer 175

Sp³-hybridization

Answer 176

One p-orbital is involved

Answer 177

One s and 3 p-orbitals are involved

Answer 178

Four p-orbitals are involved

Answer 179

All p-orbitals are involved

Answer 180

Organic compounds are water soluble

Answer 181

They exist in homologous series

Answer 182

Organic compound chain compounds

Answer 183

They form long chain compounds

Answer 184

Pi bond is broken

Answer 185

Sigma bond is broken

Answer 186

Both bonds are broken

Answer 187

None of these

Answer 188

Position isomerism

Answer 189

Cis-trans isomerism

Answer 190

Metamerism

Answer 191

Functional group isomerism

Answer 192

Reforming process

Answer 193

Hydrogenation

Answer 194

It is more stable

Answer 195

It is less stable

Answer 196

The molecule is asymmetrical around C – C bond

Answer 197

The molecule is symmetrical around C – C

Answer 198

Overlap of an s and a p orbital

Answer 199

Sidewise overlap of two parallel p orbitals

Answer 200

Overlap of two s orbitals

Answer 201

Overlap of two p orbitals along their axes

Answer 202

Polymerization

Answer 203

Substitution reactions

Answer 204

Addition reactions

Answer 205

Condensation reactions

Answer 206

Dehydration

Answer 207

Dehydrogenation

Answer 208

SiO₂+Al₂O₃

Answer 209

SiCl₆²¯ -trigonal bipyramidal

Answer 210

NH₄⁺ - tetrahedral

Answer 211

PH₄⁺ - tetrahedral

Answer 212

ClO₂ - angular

Answer 213

3 lone pair 1 bond pair

Answer 214

3 band pair one lone pair

Answer 215

2 band pair 2 lone pair

Answer 216

1 band pair 3 lone pair

Answer 217

n – Heptane

Answer 218

n – Hexane

Answer 219

iso – octane

Answer 220

Both A and B

Answer 221

Linear compounds

Answer 222

In glass industry

Answer 223

Domestic use

Answer 224

Sugar industry

Answer 225

Bake bricks

Answer 226

Functional group isomerism

Answer 227

Position isomerism

Answer 228

Metamerism

Answer 229

Chain isomerism

Answer 230

Natural gas

Answer 231

ClO₃¯-tetrahedral

Answer 232

NO₂¯ - trigonal palnar

Answer 233

SO₃²¯ - pyramidal

Answer 234

ClO₄¯ - tetrahedral

Answer 235

Carbohydrates

Answer 236

None of these

Answer 237

Enantiomers

Answer 238

Diastereomers

Answer 239

Positional isomers

Answer 240

Conformers

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