Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. The open chain organic compounds are called

Answer

Both A and B

Answer

Linear compounds

Question 2

2. Ether shows the phenomenon of

Answer

Metamerism

Answer

Cis – trass isomerism

Answer

Chain isomerism

Answer

Position isomerism

Question 3

3. The next homologue of C₁₀H₂₂ will be

Answer

C₁₃H₂₈

Answer

C₁₁H₂₄

Answer

C₉H₂₀

Answer

C₁₂H₂₆

Question 4

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

Question 5

5. Methane is produced when aluminum carbide is treated with

Question 6

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

Question 7

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

Answer

Diastereomers

Answer

Positional isomers

Answer

Conformers

Answer

Enantiomers

Question 8

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

Question 9

9. Wholer prepared urea from

Question 10

10. In Pakistan, 80% available coal is used for which purpose

Answer

Sugar industry

Answer

In glass industry

Answer

Domestic use

Answer

Bake bricks

Question 11

11. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Tetrahedral

Answer

Square planner

Answer

Triangular

Question 12

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

Answer

Natural gas

Question 13

13. Which of the following contains single bonds?

Question 14

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

Answer

Tetrahedron

Question 15

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

Question 16

16. Isomerism which is only found in alkanes?

Answer

Position isomerism

Answer

Metamerism

Answer

Functional group isomerism

Answer

cis – trans isomerism

Question 17

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

Answer

Ethyl hydrogen sulphate

Answer

Methyl alcohol

Answer

Methyl hydrogen sulphate

Answer

Ethyl alcohol

Question 18

18. Which of the following has linear shape?

Answer

None of these

Question 19

19. The components of petroleum can be separated due to

Answer

Having different M.P.

Answer

Having different chemical properties

Answer

Having different physical states

Answer

Having different B.P.

Question 20

20. The characteristic reactions of alkanes are

Answer

Condensation reactions

Answer

Addition reactions

Answer

Polymerization

Answer

Substitution reactions

Question 21

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

Question 22

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

Answer

PF₃ - pyramidal

Answer

CF₄ - tetrahedral

Answer

H₂O – tetrahedral

Answer

NH₃ - tetrahedral

Question 23

23. 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 24

24. 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

Position isomers

Answer

Chain isomers

Question 25

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

Question 26

26. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 27

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

Answer

Sp³-hybridization

Answer

Dsp²-hybridization

Answer

Sp²-hybridization

Answer

Sp-hybridization

Question 28

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

Answer

Ethanoic acid

Question 29

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

Answer

Sigma bond is broken

Answer

Pi bond is broken

Answer

None of these

Answer

Both bonds are broken

Question 30

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

Answer

SO₃²¯ - pyramidal

Answer

ClO₄¯ - tetrahedral

Answer

NO₂¯ - trigonal palnar

Answer

ClO₃¯-tetrahedral

Question 31

31. The components of petroleum can be separated due to

Answer

Having different physical states

Answer

Having different M.P.

Answer

Having different chemical properties

Answer

Having different B.P.

Question 32

32. On passing ethane into concentrated suphuric 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 33

33. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 34

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

Answer

2 band pair 2 lone pair

Answer

1 band pair 3 lone pair

Answer

3 lone pair 1 bond pair

Answer

3 band pair one lone pair

Question 35

35. In C₂H₂ carbon-carbon bond angle is

Question 36

36. Which of the following is complex?

Answer

(C₆H₁₀O₅)n

Answer

CaSO₄. 0.5H₂O

Answer

C₆H₁₂O₆

Question 37

37. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 38

38. Vital force theory was rejected by

Question 39

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

Answer

Polymerization

Answer

Isomerization

Answer

Condensation

Question 40

40. Coal is obtained from dead remains of

Answer

Both a and b

Question 41

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

Question 42

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

Answer

NH₄⁺ - tetrahedral

Answer

ClO₂ - angular

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

PH₄⁺ - tetrahedral

Question 43

43. The essential component of organic compound is

Question 44

44. Straight chain hydrocarbons are

Answer

Not in a series

Answer

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

Answer

In which atoms of C are in a series

Answer

None of these

Question 45

45. Which is the solid form of petroleum?

Question 46

46. Which molecule is nonpolar?

Question 47

47. Petroleum is mainly a mixture of

Answer

Compounds of S

Answer

Unsaturated hydrocarbon

Answer

Saturated hydrocarbons

Question 48

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

Answer

Ammonium cyanate

Question 49

49. Which one has zero octane number?

Answer

n – Hexane

Answer

iso – octane

Answer

n – Heptane

Question 50

50. 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

One sigma and three Pi

Answer

Three sigma and one Pi

Answer

Two sigma and two Pi

Question 51

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

Answer

90° and 120°

Answer

90° and 180°

Answer

45° and 90°

Answer

120° only

Question 52

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

Question 53

53. Normal by product of cracking is

Answer

All of these

Question 54

54. Bromoethane can be converted to ethane by

Answer

Reaction with alcoholic KOH

Answer

Reaction with aq KOH

Question 55

55. Organic compounds are soluble in all except

Question 56

56. Which of the following possess linear geometry

Question 57

57. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 58

58. The self-linking of carbon atoms is called

Answer

Catenation

Answer

None of these

Question 59

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

Answer

Ionic properties

Answer

Carbon forming long chain or rings

Answer

Chemical forces

Question 60

60. Acetylene had a characteristic ethereal smell resembling that of

Question 61

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

Answer

Antheracite

Question 62

62. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 63

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

Question 64

64. In benzene carbon – carbon bonds are

Answer

Single covalent

Answer

Of the order 1.5

Answer

3 single and 3 double

Answer

Double covalent

Answer 128

Hydrogen sulphides

Answer 129

Stem cracking

Answer 130

Normal cracking

Answer 131

Thermal cracking

Answer 132

Catalytic cracking

Answer 133

Homologous series

Answer 134

Functional group

Answer 135

Chemical bonding

Answer 136

Ionic complex

Answer 137

C, H, and O only

Answer 138

C and S only

Answer 139

C and H only

Answer 140

C, H, O and N only

Answer 141

The same viscosity

Answer 142

The same vapour density

Answer 143

Same molecular weights

Answer 144

Different molecular weights

Answer 145

All atoms are SP² -hybridized

Answer 146

All atoms in the ring are carbon

Answer 147

All atoms are SP³ -hybridized

Answer 148

May be other atoms

Answer 149

Alkylation

Answer 150

Sulphonation

Answer 151

Carbohydrates

Answer 152

None of these

Answer 153

Sulphonation

Answer 154

Alkylation

Answer 155

Hydrogenation

Answer 156

Reforming process

Answer 157

Tetrahedral

Answer 158

Square planer

Answer 159

Butyl alcohol

Answer 160

Prophyl alcohol

Answer 161

Diethyl pether

Answer 162

Ethyl alcohol

Answer 163

Overlap of two p orbitals along their axes

Answer 164

Sidewise overlap of two parallel p orbitals

Answer 165

Overlap of an s and a p orbital

Answer 166

Overlap of two s orbitals

Answer 167

AsF₅ - trigonal bipyramidal

Answer 168

BF₃ - trigonal planar

Answer 169

NF₃ - trigonal planar

Answer 170

H₂O - bent

Answer 171

One s and 3 p-orbitals are involved

Answer 172

One p-orbital is involved

Answer 173

All p-orbitals are involved

Answer 174

Four p-orbitals are involved

Answer 175

Metamerism

Answer 176

Functional group isomerism

Answer 177

Chain isomerism

Answer 178

Position isomerism

Answer 179

Natural gas

Answer 180

Functional group

Answer 181

Structural

Answer 182

Polymerization

Answer 183

Isomerisation

Answer 184

Carbonization

Answer 185

Hybridization

Answer 186

Alkanes possess three groups attached to each carbon

Answer 187

The bond angle is 109.5°

Answer 188

0¯ bond required less energy to be rotated

Answer 189

0¯ bond is stronger than A-bond

Answer 190

-CH₃ group

Answer 191

+NH₂ group

Answer 192

- OH group

Answer 193

-CHO group

Answer 194

Neo-Pentane

Answer 195

Neo-octane

Answer 196

All except SO₃

Answer 197

Only HF and OF₂

Answer 198

None of these

Answer 199

Monocyclic

Answer 200

None of these

Answer 201

Homocyclic

Answer 202

Heterocyclic

Answer 203

Para-magnetic

Answer 204

Un-saturated

Answer 205

None of these

Answer 206

Type of Bonding

Answer 207

Shape and Type of bonding

Answer 208

Towards the addition reaction alkenes are more reactive than alkynes

Answer 209

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

Answer 210

Alkenes do not undergo addition reactions

Answer 211

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

Answer 212

Dehydration

Answer 213

Dehydrogenation

Answer 214

Anthracene

Answer 215

Cyclohexanol

Answer 216

SiO₂+Al₂O₃

Answer 217

It is more stable

Answer 218

The molecule is symmetrical around C – C

Answer 219

The molecule is asymmetrical around C – C bond

Answer 220

It is less stable

Answer 221

Functional group

Answer 222

Metamerism

Answer 223

Position isomerism

Answer 224

Metamerism

Answer 225

Cis-trans isomerism

Answer 226

Functional group isomerism

Answer 227

They exist in homologous series

Answer 228

Organic compound chain compounds

Answer 229

Organic compounds are water soluble

Answer 230

They form long chain compounds

Answer 231

Crystallization

Answer 232

Vapourization

Answer 233

Mostly ionic in character

Answer 234

They possess particular properties

Answer 235

Rates of reactions are very fast

Answer 236

None-reactive

Answer 237

Hybrid orbitals

Answer 238

Hybrid and un hybrid orbitals

Answer 239

Un-hybrid orbitals

Answer 240

Atomic orbital and hybrid orbital

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