Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. The functional group isomer of dimethyl –ether is

Answer

Butyl alcohol

Answer

Prophyl alcohol

Answer

Diethyl pether

Answer

Ethyl alcohol

Question 2

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

Question 3

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

Question 4

4. Pi bonds are produced by overlapping of

Answer

Hybrid orbitals

Answer

Hybrid and un hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Un-hybrid orbitals

Question 5

5. The carbocyclic compounds are those which have

Answer

All atoms are SP² -hybridized

Answer

All atoms in the ring are carbon

Answer

May be other atoms

Answer

All atoms are SP³ -hybridized

Question 6

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

Answer

Dsp²-hybridization

Answer

Sp²-hybridization

Answer

Sp-hybridization

Answer

Sp³-hybridization

Question 7

7. Which is a mixture of low boiling hydrocarbon

Answer

Natural gas

Question 8

8. Hybridization explain the ________ of orbitals

Answer

Shape and Type of bonding

Answer

None of these

Answer

Type of Bonding

Question 9

9. 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 10

10. Hydrocarbons contain

Answer

C and H only

Answer

C, H, O and N only

Answer

C and S only

Answer

C, H, and O only

Question 11

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

Answer

BF₃ - trigonal planar

Answer

H₂O - bent

Answer

AsF₅ - trigonal bipyramidal

Answer

NF₃ - trigonal planar

Question 12

12. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 13

13. Which of the following is complex?

Answer

CaSO₄. 0.5H₂O

Answer

C₆H₁₂O₆

Answer

(C₆H₁₀O₅)n

Question 14

14. The perchloric acid molecule contains:

Answer

8 lone pairs, 2 π bonds, and 7 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

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

Question 15

15. On sp3 hybridization

Answer

One p-orbital is involved

Answer

Four p-orbitals are involved

Answer

One s and 3 p-orbitals are involved

Answer

All p-orbitals are involved

Question 16

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

Answer

Chemical forces

Answer

Ionic properties

Answer

Carbon forming long chain or rings

Question 17

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

Answer

Hydrogen sulphides

Question 18

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

Answer

120° only

Answer

90° and 180°

Answer

45° and 90°

Answer

90° and 120°

Question 19

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

Question 20

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

Question 21

21. The state of hybridization carbon in ethane is

Question 22

22. 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

Isomerisation

Answer

Hybridization

Question 23

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

Question 24

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

Answer

Polymerization

Answer

Isomerization

Answer

Condensation

Question 25

25. Methane is produced when aluminum carbide is treated with

Question 26

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

Question 27

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

Answer

Chain isomerism

Answer

Metamerism

Answer

Position isomerism

Answer

Functional group isomerism

Question 28

28. The active part in a molecule is called:

Answer

Functional group

Answer

Homologous series

Answer

Ionic complex

Answer

Chemical bonding

Question 29

29. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 30

30. Which of the following possess linear geometry

Question 31

31. The components of petroleum can be separated due to

Answer

Having different M.P.

Answer

Having different B.P.

Answer

Having different chemical properties

Answer

Having different physical states

Question 32

32. Unsaturated hydrocarbons containing a double bond are called

Question 33

33. Normal by product of cracking is

Answer

All of these

Question 34

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

Question 35

35. Rates of organic reactions are

Answer

None-reactive

Question 36

36. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 37

37. 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

Functional isomers

Answer

Chain isomers

Answer

Position isomers

Question 38

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

Answer

Enantiomers

Answer

Diastereomers

Answer

Positional isomers

Answer

Conformers

Question 39

39. Which one has zero octane number?

Answer

n – Heptane

Answer

n – Hexane

Answer

iso – octane

Question 40

40. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 41

41. Which of the following species is planar?

Question 42

42. 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

Catalytic cracking

Answer

Normal cracking

Answer

Thermal cracking

Question 43

43. Ether shows the phenomenon of

Answer

Position isomerism

Answer

Chain isomerism

Answer

Metamerism

Answer

Cis – trass isomerism

Question 44

44. Wholer prepared urea from

Question 45

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

Answer

The molecule is symmetrical around C – C

Answer

It is less stable

Answer

It is more stable

Answer

The molecule is asymmetrical around C – C bond

Question 46

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

Answer

NH₃ - tetrahedral

Answer

CF₄ - tetrahedral

Answer

H₂O – tetrahedral

Answer

PF₃ - pyramidal

Question 47

47. 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

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

Question 48

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

Answer

Natural gas

Question 49

49. The characteristic reactions of alkanes are

Answer

Substitution reactions

Answer

Addition reactions

Answer

Polymerization

Answer

Condensation reactions

Question 50

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

Question 51

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

Answer

Methyl hydrogen sulphate

Answer

Ethyl alcohol

Answer

Methyl alcohol

Answer

Ethyl hydrogen sulphate

Question 52

52. The essential component of organic compound is

Question 53

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

Answer

ClO₃¯-tetrahedral

Answer

ClO₄¯ - tetrahedral

Answer

SO₃²¯ - pyramidal

Answer

NO₂¯ - trigonal palnar

Question 54

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

Answer

Alkylation

Answer

Sulphonation

Question 55

55. Organic compounds are soluble in all except

Question 56

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

Question 57

57. Straight chain hydrocarbons are

Answer

In which atoms of C are in a series

Answer

Not in a series

Answer

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

Answer

None of these

Question 58

58. Vital force theory was rejected by

Question 59

59. Coal is obtained from dead remains of

Answer

Both a and b

Question 60

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

Question 61

61. The major portion of natural oil is

Question 62

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

Answer

PH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

ClO₂ - angular

Answer

NH₄⁺ - tetrahedral

Question 63

63. Which molecule is nonpolar?

Question 64

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

Answer 134

Functional group

Answer 135

Structural

Answer 136

-CHO group

Answer 137

- OH group

Answer 138

-CH₃ group

Answer 139

+NH₂ group

Answer 140

Saturated hydrocarbons

Answer 141

Compounds of S

Answer 142

Unsaturated hydrocarbon

Answer 143

Tetrahedron

Answer 144

Position isomerism

Answer 145

Metamerism

Answer 146

Functional group isomerism

Answer 147

cis – trans isomerism

Answer 148

Functional group

Answer 149

Metamerism

Answer 150

Ethanoic acid

Answer 151

Reforming process

Answer 152

Hydrogenation

Answer 153

SiO₂+Al₂O₃

Answer 154

Para-magnetic

Answer 155

Un-saturated

Answer 156

Different molecular weights

Answer 157

Same molecular weights

Answer 158

The same vapour density

Answer 159

The same viscosity

Answer 160

Triangular

Answer 161

Square planner

Answer 162

Tetrahedral

Answer 163

Cis-trans isomerism

Answer 164

Metamerism

Answer 165

Position isomerism

Answer 166

Functional group isomerism

Answer 167

Heterocyclic

Answer 168

None of these

Answer 169

Monocyclic

Answer 170

Homocyclic

Answer 171

Mostly ionic in character

Answer 172

Rates of reactions are very fast

Answer 173

They possess particular properties

Answer 174

Antheracite

Answer 175

They exist in homologous series

Answer 176

Organic compounds are water soluble

Answer 177

They form long chain compounds

Answer 178

Organic compound chain compounds

Answer 179

C₂H₂Cl₂

Answer 180

Having different physical states

Answer 181

Having different chemical properties

Answer 182

Having different B.P.

Answer 183

Having different M.P.

Answer 184

C₁₁H₂₄

Answer 185

C₁₃H₂₈

Answer 186

C₁₂H₂₆

Answer 187

C₉H₂₀

Answer 188

Neo-Pentane

Answer 189

Neo-octane

Answer 190

Double covalent

Answer 191

Single covalent

Answer 192

Of the order 1.5

Answer 193

3 single and 3 double

Answer 194

None of these

Answer 195

Ammonium cyanate

Answer 196

Dehydrogenation

Answer 197

Dehydration

Answer 198

Overlap of two p orbitals along their axes

Answer 199

Overlap of an s and a p orbital

Answer 200

Sidewise overlap of two parallel p orbitals

Answer 201

Overlap of two s orbitals

Answer 202

Methyl hydrogen sulphate

Answer 203

Ethyl alcohol

Answer 204

Ethyl hydrogen sulphate

Answer 205

Methyl alcohol

Answer 206

None of these

Answer 207

Carbohydrates

Answer 208

None of these

Answer 209

Alkanes possess three groups attached to each carbon

Answer 210

The bond angle is 109.5°

Answer 211

0¯ bond required less energy to be rotated

Answer 212

0¯ bond is stronger than A-bond

Answer 213

Pi bond is broken

Answer 214

Both bonds are broken

Answer 215

None of these

Answer 216

Sigma bond is broken

Answer 217

Sugar industry

Answer 218

Bake bricks

Answer 219

In glass industry

Answer 220

Domestic use

Answer 221

3 lone pair 1 bond pair

Answer 222

1 band pair 3 lone pair

Answer 223

3 band pair one lone pair

Answer 224

2 band pair 2 lone pair

Answer 225

Both A and B

Answer 226

Linear compounds

Answer 227

Two sigma and two Pi

Answer 228

Three sigma and one Pi

Answer 229

One sigma and three Pi

Answer 230

None of these

Answer 231

All except SO₃

Answer 232

Only HF and OF₂

Answer 233

Sulphonation

Answer 234

Alkylation

Answer 235

Tetrahedral

Answer 236

Square planer

Answer 237

Vapourization

Answer 238

Crystallization

Answer 239

Cyclohexanol

Answer 240

Anthracene

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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