Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Question 2

2. An isomer of ethanol is:

Answer

Dimethyl ether

Answer

Diethyl ether

Question 3

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

Question 4

4. 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

Two sigma and two Pi

Answer

One sigma and three Pi

Question 5

5. Which of the following species is planar?

Question 6

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

Question 7

7. Hydrocarbons contain

Answer

C, H, O and N only

Answer

C, H, and O only

Answer

C and H only

Answer

C and S only

Question 8

8. Which of the following possess linear geometry

Question 9

9. Normal by product of cracking is

Answer

All of these

Question 10

10. Ether shows the phenomenon of

Answer

Position isomerism

Answer

Chain isomerism

Answer

Metamerism

Answer

Cis – trass isomerism

Question 11

11. Which statement is true regarding reactivity?

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

Answer

Towards the addition reaction alkenes are more reactive than alkynes

Answer

Alkenes do not undergo addition reactions

Question 12

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

Question 13

13. The carbocyclic compounds are those which have

Answer

All atoms are SP² -hybridized

Answer

May be other atoms

Answer

All atoms in the ring are carbon

Answer

All atoms are SP³ -hybridized

Question 14

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

Question 15

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

Question 16

16. C₄H₈ can show isomerism

Answer

Functional group

Answer

Structural

Question 17

17. Ethyl alcohol on ____________ gives ethane

Answer

Dehydration

Answer

Dehydrogenation

Question 18

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

Answer

Methyl hydrogen sulphate

Answer

Ethyl hydrogen sulphate

Answer

Ethyl alcohol

Answer

Methyl alcohol

Question 19

19. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Triangular

Answer

Square planner

Answer

Tetrahedral

Question 20

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

Answer

Cyclohexanol

Answer

Anthracene

Question 21

21. Organic compounds are soluble in all except

Question 22

22. C₂H₂Cl₂ can show isomerism

Answer

Metamerism

Answer

Functional group

Question 23

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

Answer

Carbonization

Answer

Isomerisation

Answer

Hybridization

Answer

Polymerization

Question 24

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

Answer

Tetrahedron

Question 25

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

Answer

Conformers

Answer

Enantiomers

Answer

Diastereomers

Answer

Positional isomers

Question 26

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

Answer

Reforming process

Answer

Hydrogenation

Question 27

27. Straight chain hydrocarbons are

Answer

None of these

Answer

In which atoms of C are in a series

Answer

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

Answer

Not in a series

Question 28

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

Answer

Sulphonation

Answer

Alkylation

Question 29

29. The essential component of organic compound is

Question 30

30. Which molecule is nonpolar?

Question 31

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

Answer

They exist in homologous series

Answer

Organic compounds are water soluble

Answer

They form long chain compounds

Answer

Organic compound chain compounds

Question 32

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

Answer

Isomerization

Answer

Polymerization

Answer

Condensation

Question 33

33. Vital force theory was rejected by

Question 34

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

Answer

Same molecular weights

Answer

The same viscosity

Answer

Different molecular weights

Answer

The same vapour density

Question 35

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

Answer

Sp²-hybridization

Answer

Sp-hybridization

Answer

Dsp²-hybridization

Answer

Sp³-hybridization

Question 36

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

Answer

ClO₂ - angular

Answer

PH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

NH₄⁺ - tetrahedral

Question 37

37. 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 38

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

Question 39

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

Question 40

40. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 41

41. Acetylene had a characteristic ethereal smell resembling that of

Question 42

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

Answer

None of these

Answer

Monocyclic

Answer

Heterocyclic

Answer

Homocyclic

Question 43

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

Question 44

44. Coal is obtained from dead remains of

Answer

Both a and b

Question 45

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

Answer

Functional group isomerism

Answer

Position isomerism

Answer

Metamerism

Answer

Chain isomerism

Question 46

46. Which is the character of organic compounds

Answer

Rates of reactions are very fast

Answer

They possess particular properties

Answer

Mostly ionic in character

Question 47

47. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 48

48. Methane is produced when aluminum carbide is treated with

Question 49

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

Question 50

50. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 51

51. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

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. Which is the solid form of petroleum?

Question 54

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

Answer

Natural gas

Question 55

55. Rates of organic reactions are

Answer

None-reactive

Question 56

56. 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

The combustion product, lead causes air pollution

Answer

It is costly

Answer

Pb is difficult to obtain in bulk qualities

Question 57

57. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 58

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

Question 59

59. 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 60

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

Answer

It is less stable

Answer

The molecule is symmetrical around C – C

Answer

The molecule is asymmetrical around C – C bond

Answer

It is more stable

Question 61

61. Which of the following has linear shape?

Answer

None of these

Question 62

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

Answer

45° and 90°

Answer

90° and 180°

Answer

120° only

Answer

90° and 120°

Question 63

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

Answer

Antheracite

Question 64

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

Answer 117

Natural gas

Answer 118

Carbon forming long chain or rings

Answer 119

Chemical forces

Answer 120

Ionic properties

Answer 121

Butyl alcohol

Answer 122

Diethyl pether

Answer 123

Prophyl alcohol

Answer 124

Ethyl alcohol

Answer 125

None of these

Answer 126

Carbohydrates

Answer 127

CF₄ - tetrahedral

Answer 128

H₂O – tetrahedral

Answer 129

NH₃ - tetrahedral

Answer 130

PF₃ - pyramidal

Answer 131

Tetrahedral

Answer 132

Square planer

Answer 133

Stem cracking

Answer 134

Thermal cracking

Answer 135

Catalytic cracking

Answer 136

Normal cracking

Answer 137

Ethanoic acid

Answer 138

SiO₂+Al₂O₃

Answer 139

3 band pair one lone pair

Answer 140

1 band pair 3 lone pair

Answer 141

3 lone pair 1 bond pair

Answer 142

2 band pair 2 lone pair

Answer 143

Functional group

Answer 144

Ionic complex

Answer 145

Homologous series

Answer 146

Chemical bonding

Answer 147

Both bonds are broken

Answer 148

None of these

Answer 149

Pi bond is broken

Answer 150

Sigma bond is broken

Answer 151

Crystallization

Answer 152

Vapourization

Answer 153

Un-saturated

Answer 154

Para-magnetic

Answer 155

Domestic use

Answer 156

In glass industry

Answer 157

Sugar industry

Answer 158

Bake bricks

Answer 159

Hydrogen sulphides

Answer 160

Having different chemical properties

Answer 161

Having different B.P.

Answer 162

Having different M.P.

Answer 163

Having different physical states

Answer 164

(C₆H₁₀O₅)n

Answer 165

C₆H₁₂O₆

Answer 166

CaSO₄. 0.5H₂O

Answer 167

Of the order 1.5

Answer 168

Single covalent

Answer 169

3 single and 3 double

Answer 170

Double covalent

Answer 171

Functional group isomerism

Answer 172

Metamerism

Answer 173

Position isomerism

Answer 174

cis – trans isomerism

Answer 175

Chain isomers

Answer 176

Functional isomers

Answer 177

Position isomers

Answer 178

Unsaturated hydrocarbon

Answer 179

Saturated hydrocarbons

Answer 180

Compounds of S

Answer 181

0¯ bond required less energy to be rotated

Answer 182

The bond angle is 109.5°

Answer 183

Alkanes possess three groups attached to each carbon

Answer 184

0¯ bond is stronger than A-bond

Answer 185

Sulphonation

Answer 186

Alkylation

Answer 187

None of these

Answer 188

Type of Bonding

Answer 189

Shape and Type of bonding

Answer 190

Ammonium cyanate

Answer 191

BF₃ - trigonal planar

Answer 192

NF₃ - trigonal planar

Answer 193

AsF₅ - trigonal bipyramidal

Answer 194

H₂O - bent

Answer 195

-CHO group

Answer 196

+NH₂ group

Answer 197

- OH group

Answer 198

-CH₃ group

Answer 199

None of these

Answer 200

Only HF and OF₂

Answer 201

All except SO₃

Answer 202

iso – octane

Answer 203

n – Heptane

Answer 204

n – Hexane

Answer 205

ClO₃¯-tetrahedral

Answer 206

ClO₄¯ - tetrahedral

Answer 207

SO₃²¯ - pyramidal

Answer 208

NO₂¯ - trigonal palnar

Answer 209

Ethyl hydrogen sulphate

Answer 210

Methyl hydrogen sulphate

Answer 211

Ethyl alcohol

Answer 212

Methyl alcohol

Answer 213

C₁₂H₂₆

Answer 214

C₁₁H₂₄

Answer 215

C₁₃H₂₈

Answer 216

C₉H₂₀

Answer 217

Hybrid and un hybrid orbitals

Answer 218

Un-hybrid orbitals

Answer 219

Hybrid orbitals

Answer 220

Atomic orbital and hybrid orbital

Answer 221

Polymerization

Answer 222

Addition reactions

Answer 223

Substitution reactions

Answer 224

Condensation reactions

Answer 225

Functional group isomerism

Answer 226

Metamerism

Answer 227

Cis-trans isomerism

Answer 228

Position isomerism

Answer 229

None of these

Answer 230

Catenation

Answer 231

Overlap of two s orbitals

Answer 232

Overlap of two p orbitals along their axes

Answer 233

Sidewise overlap of two parallel p orbitals

Answer 234

Overlap of an s and a p orbital

Answer 235

Neo-Pentane

Answer 236

Neo-octane

Answer 237

All p-orbitals are involved

Answer 238

One s and 3 p-orbitals are involved

Answer 239

One p-orbital is involved

Answer 240

Four p-orbitals are involved

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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