Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

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

Answer

H₂O – tetrahedral

Answer

PF₃ - pyramidal

Answer

CF₄ - tetrahedral

Answer

NH₃ - tetrahedral

Question 2

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

Question 3

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

Answer

Sulphonation

Answer

Alkylation

Question 4

4. The octane number is 100 for

Answer

Neo-octane

Answer

Neo-Pentane

Question 5

5. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 6

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

Answer

Positional isomers

Answer

Diastereomers

Answer

Conformers

Answer

Enantiomers

Question 7

7. Which is the character of organic compounds

Answer

Mostly ionic in character

Answer

They possess particular properties

Answer

Rates of reactions are very fast

Question 8

8. Wholer prepared urea from

Question 9

9. The essential component of organic compound is

Question 10

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

Answer

Functional group isomerism

Answer

Metamerism

Answer

Position isomerism

Answer

Chain isomerism

Question 11

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

Answer

Hydrogen sulphides

Question 12

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

Answer

Ethyl alcohol

Answer

Methyl alcohol

Answer

Ethyl hydrogen sulphate

Answer

Methyl hydrogen sulphate

Question 13

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

Question 14

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

Question 15

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

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

ClO₂ - angular

Answer

PH₄⁺ - tetrahedral

Answer

NH₄⁺ - tetrahedral

Question 16

16. The number of isomers of C₆H₁₄ is:

Question 17

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

Answer

Ammonium cyanate

Question 18

18. 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 19

19. Alkanes cannot show cis-trans isomerism

Answer

0¯ bond required less energy to be rotated

Answer

Alkanes possess three groups attached to each carbon

Answer

The bond angle is 109.5°

Answer

0¯ bond is stronger than A-bond

Question 20

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

Answer

120° only

Answer

45° and 90°

Answer

90° and 180°

Answer

90° and 120°

Question 21

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

Answer

The same viscosity

Answer

Same molecular weights

Answer

The same vapour density

Answer

Different molecular weights

Question 22

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

Answer

Un-saturated

Answer

Para-magnetic

Question 23

23. Which of the following contains single bonds?

Question 24

24. Polythene is a polymer of

Question 25

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

Answer

Hybridization

Answer

Polymerization

Answer

Carbonization

Answer

Isomerisation

Question 26

26. The components of petroleum can be separated due to

Answer

Having different chemical properties

Answer

Having different B.P.

Answer

Having different physical states

Answer

Having different M.P.

Question 27

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

Answer

1 band pair 3 lone pair

Answer

2 band pair 2 lone pair

Answer

3 band pair one lone pair

Answer

3 lone pair 1 bond pair

Question 28

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

Answer

Chemical forces

Answer

Carbon forming long chain or rings

Answer

Ionic properties

Question 29

29. In C₂H₂ carbon-carbon bond angle is

Question 30

30. Either show the phenomenon of

Answer

Metamerism

Answer

Cis-trans isomerism

Answer

Functional group isomerism

Answer

Position isomerism

Question 31

31. The functional group isomer of dimethyl –ether is

Answer

Butyl alcohol

Answer

Ethyl alcohol

Answer

Diethyl pether

Answer

Prophyl alcohol

Question 32

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

Answer

ClO₄¯ - tetrahedral

Answer

NO₂¯ - trigonal palnar

Answer

ClO₃¯-tetrahedral

Answer

SO₃²¯ - pyramidal

Question 33

33. The characteristic reactions of alkanes are

Answer

Condensation reactions

Answer

Substitution reactions

Answer

Polymerization

Answer

Addition reactions

Question 34

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

Answer

Sp-hybridization

Answer

Dsp²-hybridization

Answer

Sp²-hybridization

Answer

Sp³-hybridization

Question 35

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

Question 36

36. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 37

37. What hybridization is predicted for sulfur in the HSO₃¯ ion?

Question 38

38. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Triangular

Answer

Square planner

Answer

Tetrahedral

Question 39

39. Bromoethane can be converted to ethane by

Answer

Reaction with alcoholic KOH

Answer

Reaction with aq KOH

Question 40

40. Coal is obtained from dead remains of

Answer

Both a and b

Question 41

41. C₄H₈ can show isomerism

Answer

Functional group

Answer

Structural

Question 42

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

Question 43

43. 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 44

44. Acetylene had a characteristic ethereal smell resembling that of

Question 45

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

Question 46

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

Answer

Anthracene

Answer

Cyclohexanol

Question 47

47. Methane is produced when aluminum carbide is treated with

Question 48

48. Which is the solid form of petroleum?

Question 49

49. Which of the following possess linear geometry

Question 50

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

Question 51

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

Question 52

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

Answer

Polymerization

Answer

Condensation

Answer

Isomerization

Question 53

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

Answer

Tetrahedron

Question 54

54. On sp3 hybridization

Answer

One p-orbital is involved

Answer

Four p-orbitals are involved

Answer

All p-orbitals are involved

Answer

One s and 3 p-orbitals are involved

Question 55

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

Question 56

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

Answer

- OH group

Answer

-CHO group

Answer

+NH₂ group

Answer

-CH₃ group

Question 57

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

Answer

NF₃ - trigonal planar

Answer

AsF₅ - trigonal bipyramidal

Answer

BF₃ - trigonal planar

Answer

H₂O - bent

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

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

Answer

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

Question 60

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

Question 61

61. 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

Position isomers

Answer

Chain isomers

Answer

Functional isomers

Question 62

62. 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

It is more stable

Answer

The molecule is asymmetrical around C – C bond

Question 63

63. Organic compounds are soluble in all except

Question 64

64. The major portion of natural oil is

Answer 125

Ionic complex

Answer 126

Homologous series

Answer 127

Chemical bonding

Answer 128

Functional group

Answer 129

None of these

Answer 130

Position isomerism

Answer 131

Functional group isomerism

Answer 132

cis – trans isomerism

Answer 133

Metamerism

Answer 134

Sugar industry

Answer 135

Domestic use

Answer 136

Bake bricks

Answer 137

In glass industry

Answer 138

Ethyl hydrogen sulphate

Answer 139

Methyl hydrogen sulphate

Answer 140

Ethyl alcohol

Answer 141

Methyl alcohol

Answer 142

Alkylation

Answer 143

Sulphonation

Answer 144

All of these

Answer 145

Organic compounds are water soluble

Answer 146

They exist in homologous series

Answer 147

They form long chain compounds

Answer 148

Organic compound chain compounds

Answer 149

Hybrid orbitals

Answer 150

Hybrid and un hybrid orbitals

Answer 151

Atomic orbital and hybrid orbital

Answer 152

Un-hybrid orbitals

Answer 153

Natural gas

Answer 154

Vapourization

Answer 155

Crystallization

Answer 156

Hydrogenation

Answer 157

Reforming process

Answer 158

Two sigma and two Pi

Answer 159

One sigma and three Pi

Answer 160

Three sigma and one Pi

Answer 161

Antheracite

Answer 162

Metamerism

Answer 163

Functional group

Answer 164

C and S only

Answer 165

C and H only

Answer 166

C, H, and O only

Answer 167

C, H, O and N only

Answer 168

Linear compounds

Answer 169

Both A and B

Answer 170

May be other atoms

Answer 171

All atoms are SP³ -hybridized

Answer 172

All atoms are SP² -hybridized

Answer 173

All atoms in the ring are carbon

Answer 174

None of these

Answer 175

Monocyclic

Answer 176

Heterocyclic

Answer 177

Homocyclic

Answer 178

Type of Bonding

Answer 179

Shape and Type of bonding

Answer 180

None of these

Answer 181

Having different M.P.

Answer 182

Having different B.P.

Answer 183

Having different physical states

Answer 184

Having different chemical properties

Answer 185

Ethanoic acid

Answer 186

Diethyl ether

Answer 187

Dimethyl ether

Answer 188

Metamerism

Answer 189

Cis – trass isomerism

Answer 190

Position isomerism

Answer 191

Chain isomerism

Answer 192

Tetrahedral

Answer 193

Square planer

Answer 194

C₂H₂Cl₂

Answer 195

It damages the engine

Answer 196

Pb is difficult to obtain in bulk qualities

Answer 197

It is costly

Answer 198

The combustion product, lead causes air pollution

Answer 199

None-reactive

Answer 200

Dehydration

Answer 201

Dehydrogenation

Answer 202

n – Heptane

Answer 203

n – Hexane

Answer 204

iso – octane

Answer 205

Compounds of S

Answer 206

Saturated hydrocarbons

Answer 207

Unsaturated hydrocarbon

Answer 208

Both bonds are broken

Answer 209

None of these

Answer 210

Pi bond is broken

Answer 211

Sigma bond is broken

Answer 212

Overlap of two s orbitals

Answer 213

Overlap of an s and a p orbital

Answer 214

Sidewise overlap of two parallel p orbitals

Answer 215

Overlap of two p orbitals along their axes

Answer 216

Of the order 1.5

Answer 217

Double covalent

Answer 218

Single covalent

Answer 219

3 single and 3 double

Answer 220

Carbohydrates

Answer 221

None of these

Answer 222

None of these

Answer 223

Catenation

Answer 224

C₆H₁₂O₆

Answer 225

CaSO₄. 0.5H₂O

Answer 226

(C₆H₁₀O₅)n

Answer 227

Natural gas

Answer 228

None of these

Answer 229

None of these

Answer 230

In which atoms of C are in a series

Answer 231

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

Answer 232

Not in a series

Answer 233

C₁₂H₂₆

Answer 234

C₁₃H₂₈

Answer 235

C₉H₂₀

Answer 236

C₁₁H₂₄

Answer 237

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

Answer 238

Alkenes do not undergo addition reactions

Answer 239

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

Answer 240

Towards the addition reaction alkenes are more reactive than alkynes

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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