Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. Linear shape is shown by which compound

Answer

C₂H₂Cl₂

Question 2

2. The components of petroleum can be separated due to

Answer

Having different chemical properties

Answer

Having different M.P.

Answer

Having different physical states

Answer

Having different B.P.

Question 3

3. C₄H₈ can show isomerism

Answer

Structural

Answer

Functional group

Question 4

4. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Square planner

Answer

Tetrahedral

Answer

Triangular

Question 5

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

Question 6

6. Ethyl alcohol on ____________ gives ethane

Answer

Dehydrogenation

Answer

Dehydration

Question 7

7. Hydrocarbons contain

Answer

C and S only

Answer

C, H, and O only

Answer

C, H, O and N only

Answer

C and H only

Question 8

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

Answer

CF₄ - tetrahedral

Answer

NH₃ - tetrahedral

Answer

H₂O – tetrahedral

Answer

PF₃ - pyramidal

Question 9

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

Answer

Reforming process

Answer

Hydrogenation

Question 10

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

Question 11

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

Question 12

12. Which one has zero octane number?

Answer

iso – octane

Answer

n – Hexane

Answer

n – Heptane

Question 13

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

Answer

Sp³-hybridization

Answer

Sp-hybridization

Answer

Dsp²-hybridization

Answer

Sp²-hybridization

Question 14

14. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 15

15. The octane number is 100 for

Answer

Neo-octane

Answer

Neo-Pentane

Question 16

16. 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 17

17. Unsaturated hydrocarbons containing a double bond are called

Question 18

18. Acetylene had a characteristic ethereal smell resembling that of

Question 19

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

Answer

The molecule is asymmetrical around C – C bond

Answer

It is more stable

Answer

The molecule is symmetrical around C – C

Answer

It is less stable

Question 20

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

Question 21

21. On passing ethane into concentrated suphuric 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 22

22. Organic compounds are soluble in all except

Question 23

23. Which of the following has linear shape?

Answer

None of these

Question 24

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

Answer

Tetrahedron

Question 25

25. The essential component of organic compound is

Question 26

26. 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

Functional isomers

Answer

Chain isomers

Question 27

27. 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

0¯ bond is stronger than A-bond

Answer

The bond angle is 109.5°

Question 28

28. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 29

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

Question 30

30. 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 31

31. Which molecule is nonpolar?

Question 32

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

Answer

90° and 120°

Answer

45° and 90°

Answer

90° and 180°

Answer

120° only

Question 33

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

Question 34

34. Peat before conversion to bituminous coal is converted to

Answer

Anthracite

Question 35

35. 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 36

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

Question 37

37. The demand of gasoline can be fulfilled by

Answer

Crystallization

Answer

Vapourization

Question 38

38. The perchloric acid molecule contains:

Answer

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

Answer

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

Answer

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

Answer

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

Question 39

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

Answer

-CHO group

Answer

- OH group

Answer

+NH₂ group

Answer

-CH₃ group

Question 40

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

Answer

Polymerization

Answer

Carbonization

Answer

Hybridization

Answer

Isomerisation

Question 41

41. On sp3 hybridization

Answer

One p-orbital is involved

Answer

One s and 3 p-orbitals are involved

Answer

All p-orbitals are involved

Answer

Four p-orbitals are involved

Question 42

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

Question 43

43. The functional group isomer of dimethyl –ether is

Answer

Diethyl pether

Answer

Butyl alcohol

Answer

Ethyl alcohol

Answer

Prophyl alcohol

Question 44

44. Which of the following species is planar?

Question 45

45. Wholer prepared urea from

Question 46

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

Answer

The same viscosity

Answer

The same vapour density

Answer

Same molecular weights

Answer

Different molecular weights

Question 47

47. Which of the following possess linear geometry

Question 48

48. 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 49

49. Petroleum is mainly a mixture of

Answer

Saturated hydrocarbons

Answer

Compounds of S

Answer

Unsaturated hydrocarbon

Question 50

50. Bromoethane can be converted to ethane by

Answer

Reaction with aq KOH

Answer

Reaction with alcoholic KOH

Question 51

51. The components of petroleum can be separated due to

Answer

Having different M.P.

Answer

Having different B.P.

Answer

Having different physical states

Answer

Having different chemical properties

Question 52

52. Which one is not an organic compound

Answer

None of these

Answer

Carbohydrates

Question 53

53. Which of the following is complex?

Answer

CaSO₄. 0.5H₂O

Answer

(C₆H₁₀O₅)n

Answer

C₆H₁₂O₆

Question 54

54. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 55

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

Answer

Domestic use

Answer

Sugar industry

Answer

Bake bricks

Answer

In glass industry

Question 56

56. 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

Thermal cracking

Answer

Normal cracking

Answer

Catalytic cracking

Answer

Stem cracking

Question 57

57. The characteristic reactions of alkanes are

Answer

Addition reactions

Answer

Condensation reactions

Answer

Polymerization

Answer

Substitution reactions

Question 58

58. 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

Both bonds are broken

Answer

None of these

Question 59

59. Pi bonds are produced by overlapping of

Answer

Hybrid and un hybrid orbitals

Answer

Hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Un-hybrid orbitals

Question 60

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

Answer

Cyclohexanol

Answer

Anthracene

Question 61

61. Coal is obtained from dead remains of

Answer

Both a and b

Question 62

62. The major portion of natural oil is

Question 63

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

Answer

Hydrogen sulphides

Question 64

64. 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

Answer 139

SiO₂+Al₂O₃

Answer 140

NH₄⁺ - tetrahedral

Answer 141

PH₄⁺ - tetrahedral

Answer 142

SiCl₆²¯ -trigonal bipyramidal

Answer 143

ClO₂ - angular

Answer 144

Homologous series

Answer 145

Chemical bonding

Answer 146

Ionic complex

Answer 147

Functional group

Answer 148

All atoms in the ring are carbon

Answer 149

All atoms are SP² -hybridized

Answer 150

All atoms are SP³ -hybridized

Answer 151

May be other atoms

Answer 152

None of these

Answer 153

All except SO₃

Answer 154

Only HF and OF₂

Answer 155

Linear compounds

Answer 156

Both A and B

Answer 157

SO₃²¯ - pyramidal

Answer 158

ClO₃¯-tetrahedral

Answer 159

ClO₄¯ - tetrahedral

Answer 160

NO₂¯ - trigonal palnar

Answer 161

Natural gas

Answer 162

None of these

Answer 163

Ethanoic acid

Answer 164

Chain isomerism

Answer 165

Metamerism

Answer 166

Cis – trass isomerism

Answer 167

Position isomerism

Answer 168

Ammonium cyanate

Answer 169

C₁₂H₂₆

Answer 170

C₉H₂₀

Answer 171

C₁₃H₂₈

Answer 172

C₁₁H₂₄

Answer 173

Conformers

Answer 174

Enantiomers

Answer 175

Diastereomers

Answer 176

Positional isomers

Answer 177

Carbon forming long chain or rings

Answer 178

Ionic properties

Answer 179

Chemical forces

Answer 180

Type of Bonding

Answer 181

Shape and Type of bonding

Answer 182

None of these

Answer 183

None-reactive

Answer 184

Mostly ionic in character

Answer 185

They possess particular properties

Answer 186

Rates of reactions are very fast

Answer 187

All of these

Answer 188

Pb is difficult to obtain in bulk qualities

Answer 189

The combustion product, lead causes air pollution

Answer 190

It damages the engine

Answer 191

It is costly

Answer 192

Alkylation

Answer 193

Sulphonation

Answer 194

Natural gas

Answer 195

They form long chain compounds

Answer 196

They exist in homologous series

Answer 197

Organic compound chain compounds

Answer 198

Organic compounds are water soluble

Answer 199

Un-saturated

Answer 200

Para-magnetic

Answer 201

Metamerism

Answer 202

Chain isomerism

Answer 203

Functional group isomerism

Answer 204

Position isomerism

Answer 205

Sidewise overlap of two parallel p orbitals

Answer 206

Overlap of two s orbitals

Answer 207

Overlap of an s and a p orbital

Answer 208

Overlap of two p orbitals along their axes

Answer 209

Polymerization

Answer 210

Condensation

Answer 211

Isomerization

Answer 212

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

Answer 213

Alkenes do not undergo addition reactions

Answer 214

Towards the addition reaction alkenes are more reactive than alkynes

Answer 215

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

Answer 216

Single covalent

Answer 217

3 single and 3 double

Answer 218

Double covalent

Answer 219

Of the order 1.5

Answer 220

cis – trans isomerism

Answer 221

Metamerism

Answer 222

Functional group isomerism

Answer 223

Position isomerism

Answer 224

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

Answer 225

Not in a series

Answer 226

In which atoms of C are in a series

Answer 227

None of these

Answer 228

Sulphonation

Answer 229

Alkylation

Answer 230

Antheracite

Answer 231

None of these

Answer 232

Heterocyclic

Answer 233

Homocyclic

Answer 234

Monocyclic

Answer 235

Functional group

Answer 236

Metamerism

Answer 237

Position isomerism

Answer 238

Metamerism

Answer 239

Functional group isomerism

Answer 240

Cis-trans isomerism

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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