Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Question 2

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

Answer

Both bonds are broken

Answer

Sigma bond is broken

Answer

Pi bond is broken

Answer

None of these

Question 3

3. Straight chain hydrocarbons are

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

None of these

Answer

Not in a series

Question 4

4. On sp3 hybridization

Answer

All p-orbitals are involved

Answer

One s and 3 p-orbitals are involved

Answer

One p-orbital is involved

Answer

Four p-orbitals are involved

Question 5

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

Question 6

6. C₂H₂Cl₂ can show isomerism

Answer

Metamerism

Answer

Functional group

Question 7

7. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 8

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

Question 9

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

Question 10

10. 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 11

11. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 12

12. The open chain organic compounds are called

Answer

Linear compounds

Answer

Both A and B

Question 13

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

Question 14

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

Answer

Para-magnetic

Answer

Un-saturated

Question 15

15. The number of isomers of C₆H₁₄ is:

Question 16

16. The characteristic reactions of alkanes are

Answer

Addition reactions

Answer

Substitution reactions

Answer

Polymerization

Answer

Condensation reactions

Question 17

17. 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 18

18. C₄H₈ can show isomerism

Answer

Structural

Answer

Functional group

Question 19

19. Isomerism which is only found in alkanes?

Answer

Position isomerism

Answer

Metamerism

Answer

Functional group isomerism

Answer

cis – trans isomerism

Question 20

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

Answer

Methyl alcohol

Answer

Ethyl hydrogen sulphate

Answer

Methyl hydrogen sulphate

Answer

Ethyl alcohol

Question 21

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

Answer

Hydrogenation

Answer

Reforming process

Question 22

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

Answer

Organic compounds are water soluble

Answer

They form long chain compounds

Answer

Organic compound chain compounds

Answer

They exist in homologous series

Question 23

23. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 24

24. Which of the following possess linear geometry

Question 25

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

Answer

Ionic properties

Answer

Chemical forces

Answer

Carbon forming long chain or rings

Question 26

26. Petroleum is mainly a mixture of

Answer

Compounds of S

Answer

Unsaturated hydrocarbon

Answer

Saturated hydrocarbons

Question 27

27. Which statement is true regarding reactivity?

Answer

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

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

Answer

Alkenes do not undergo addition reactions

Question 28

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

Question 29

29. The active part in a molecule is called:

Answer

Functional group

Answer

Ionic complex

Answer

Chemical bonding

Answer

Homologous series

Question 30

30. The components of petroleum can be separated due to

Answer

Having different chemical properties

Answer

Having different B.P.

Answer

Having different M.P.

Answer

Having different physical states

Question 31

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

Answer

Methyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Ethyl alcohol

Answer

Ethyl hydrogen sulphate

Question 32

32. Which is the character of organic compounds

Answer

They possess particular properties

Answer

Rates of reactions are very fast

Answer

Mostly ionic in character

Question 33

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

Question 34

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

Question 35

35. Which of the following species is planar?

Question 36

36. Unsaturated hydrocarbons containing a double bond are called

Question 37

37. The state of hybridization carbon in ethane is

Question 38

38. Methane is produced when aluminum carbide is treated with

Question 39

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

Answer

45° and 90°

Answer

120° only

Answer

90° and 180°

Answer

90° and 120°

Question 40

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

Question 41

41. Organic compounds are soluble in all except

Question 42

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

Answer

All except SO₃

Answer

Only HF and OF₂

Answer

None of these

Question 43

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

Answer

Natural gas

Question 44

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

Question 45

45. In C₂H₂ carbon-carbon bond angle is

Question 46

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

Question 47

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

Question 48

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

Answer

Chain isomerism

Answer

Position isomerism

Answer

Functional group isomerism

Answer

Metamerism

Question 49

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

Answer

Tetrahedron

Question 50

50. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 51

51. 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 52

52. Hybridization explain the ________ of orbitals

Answer

None of these

Answer

Type of Bonding

Answer

Shape and Type of bonding

Question 53

53. The structure of benzene is

Answer

Tetrahedral

Answer

Square planer

Question 54

54. Ethyl alcohol on ____________ gives ethane

Answer

Dehydrogenation

Answer

Dehydration

Question 55

55. Coal is obtained from dead remains of

Answer

Both a and b

Question 56

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

Question 57

57. 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 58

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

Answer

1 band pair 3 lone pair

Answer

3 band pair one lone pair

Answer

3 lone pair 1 bond pair

Answer

2 band pair 2 lone pair

Question 59

59. The components of petroleum can be separated due to

Answer

Having different B.P.

Answer

Having different M.P.

Answer

Having different chemical properties

Answer

Having different physical states

Question 60

60. Either show the phenomenon of

Answer

Position isomerism

Answer

Functional group isomerism

Answer

Metamerism

Answer

Cis-trans isomerism

Question 61

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

Answer

H₂O - bent

Answer

BF₃ - trigonal planar

Answer

NF₃ - trigonal planar

Answer

AsF₅ - trigonal bipyramidal

Question 62

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

Answer

CF₄ - tetrahedral

Answer

H₂O – tetrahedral

Answer

NH₃ - tetrahedral

Answer

PF₃ - pyramidal

Question 63

63. 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 64

64. 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

Catalytic cracking

Answer

Normal cracking

Answer

Stem cracking

Answer

Thermal cracking

Answer 128

None of these

Answer 129

Catenation

Answer 130

NH₄⁺ - tetrahedral

Answer 131

SiCl₆²¯ -trigonal bipyramidal

Answer 132

PH₄⁺ - tetrahedral

Answer 133

ClO₂ - angular

Answer 134

Sugar industry

Answer 135

In glass industry

Answer 136

Domestic use

Answer 137

Bake bricks

Answer 138

Different molecular weights

Answer 139

The same vapour density

Answer 140

Same molecular weights

Answer 141

The same viscosity

Answer 142

It is costly

Answer 143

Pb is difficult to obtain in bulk qualities

Answer 144

The combustion product, lead causes air pollution

Answer 145

It damages the engine

Answer 146

Un-hybrid orbitals

Answer 147

Hybrid and un hybrid orbitals

Answer 148

Atomic orbital and hybrid orbital

Answer 149

Hybrid orbitals

Answer 150

Sp²-hybridization

Answer 151

Sp³-hybridization

Answer 152

Sp-hybridization

Answer 153

Dsp²-hybridization

Answer 154

Ammonium cyanate

Answer 155

None of these

Answer 156

Diastereomers

Answer 157

Positional isomers

Answer 158

Conformers

Answer 159

Enantiomers

Answer 160

Dimethyl ether

Answer 161

Diethyl ether

Answer 162

The molecule is asymmetrical around C – C bond

Answer 163

It is less stable

Answer 164

The molecule is symmetrical around C – C

Answer 165

It is more stable

Answer 166

iso – octane

Answer 167

n – Heptane

Answer 168

n – Hexane

Answer 169

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

Answer 170

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

Answer 171

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

Answer 172

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

Answer 173

Cyclohexanol

Answer 174

Anthracene

Answer 175

Alkanes possess three groups attached to each carbon

Answer 176

The bond angle is 109.5°

Answer 177

0¯ bond required less energy to be rotated

Answer 178

0¯ bond is stronger than A-bond

Answer 179

Ethanoic acid

Answer 180

Alkylation

Answer 181

Sulphonation

Answer 182

Reaction with alcoholic KOH

Answer 183

Reaction with aq KOH

Answer 184

Hybridization

Answer 185

Isomerisation

Answer 186

Polymerization

Answer 187

Carbonization

Answer 188

None-reactive

Answer 189

Chain isomerism

Answer 190

Cis – trass isomerism

Answer 191

Position isomerism

Answer 192

Metamerism

Answer 193

C₁₃H₂₈

Answer 194

C₁₁H₂₄

Answer 195

C₉H₂₀

Answer 196

C₁₂H₂₆

Answer 197

Hydrogen sulphides

Answer 198

-CHO group

Answer 199

- OH group

Answer 200

+NH₂ group

Answer 201

-CH₃ group

Answer 202

None of these

Answer 203

All of these

Answer 204

Overlap of two s orbitals

Answer 205

Sidewise overlap of two parallel p orbitals

Answer 206

Overlap of two p orbitals along their axes

Answer 207

Overlap of an s and a p orbital

Answer 208

All atoms are SP³ -hybridized

Answer 209

All atoms are SP² -hybridized

Answer 210

May be other atoms

Answer 211

All atoms in the ring are carbon

Answer 212

Position isomers

Answer 213

Chain isomers

Answer 214

Functional isomers

Answer 215

Neo-octane

Answer 216

Neo-Pentane

Answer 217

(C₆H₁₀O₅)n

Answer 218

CaSO₄. 0.5H₂O

Answer 219

C₆H₁₂O₆

Answer 220

Isomerization

Answer 221

Condensation

Answer 222

Polymerization

Answer 223

Butyl alcohol

Answer 224

Diethyl pether

Answer 225

Ethyl alcohol

Answer 226

Prophyl alcohol

Answer 227

Tetrahedral

Answer 228

Triangular

Answer 229

Square planner

Answer 230

None of these

Answer 231

Carbohydrates

Answer 232

Sulphonation

Answer 233

Alkylation

Answer 234

Vapourization

Answer 235

Crystallization

Answer 236

NO₂¯ - trigonal palnar

Answer 237

ClO₄¯ - tetrahedral

Answer 238

SO₃²¯ - pyramidal

Answer 239

ClO₃¯-tetrahedral

Answer 240

Antheracite

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