Fundamental Principles of Organic Chemistry Online Mcqs Test

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Question 1

1. In catalytic cracking, the typical catalyst used is

Answer

SiO₂+Al₂O₃

Question 2

2. The perchloric acid molecule contains:

Answer

9 lone pairs, no π bonds, and 6 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

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

Question 3

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

Answer

Sulphonation

Answer

Alkylation

Question 4

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

Answer

Metamerism

Answer

Chain isomerism

Answer

Functional group isomerism

Answer

Position isomerism

Question 5

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

Answer

Polymerization

Answer

Isomerization

Answer

Condensation

Question 6

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

Answer

3 lone pair 1 bond pair

Answer

2 band pair 2 lone pair

Answer

1 band pair 3 lone pair

Answer

3 band pair one lone pair

Question 7

7. Methane is produced when aluminum carbide is treated with

Question 8

8. The essential component of organic compound is

Question 9

9. C₂H₂Cl₂ can show isomerism

Answer

Metamerism

Answer

Functional group

Question 10

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

Answer

BF₃ - trigonal planar

Answer

NF₃ - trigonal planar

Answer

H₂O - bent

Answer

AsF₅ - trigonal bipyramidal

Question 11

11. The compounds which have any atom other than carbon atom, in rings are called as

Answer

Homocyclic

Answer

None of these

Answer

Heterocyclic

Answer

Monocyclic

Question 12

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

Answer

All except SO₃

Answer

None of these

Answer

Only HF and OF₂

Question 13

13. The octane number is 100 for

Answer

Neo-Pentane

Answer

Neo-octane

Question 14

14. Ethyl alcohol on ____________ gives ethane

Answer

Dehydration

Answer

Dehydrogenation

Question 15

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

Answer

Domestic use

Answer

In glass industry

Answer

Sugar industry

Answer

Bake bricks

Question 16

16. Normal by product of cracking is

Answer

All of these

Question 17

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

Answer

Organic compound chain compounds

Answer

Organic compounds are water soluble

Answer

They form long chain compounds

Answer

They exist in homologous series

Question 18

18. 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

Normal cracking

Answer

Stem cracking

Answer

Catalytic cracking

Answer

Thermal cracking

Question 19

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

Answer

Carbonization

Answer

Hybridization

Answer

Isomerisation

Answer

Polymerization

Question 20

20. 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

Two sigma and two Pi

Answer

One sigma and three Pi

Answer

Three sigma and one Pi

Question 21

21. The components of petroleum can be separated due to

Answer

Having different M.P.

Answer

Having different physical states

Answer

Having different chemical properties

Answer

Having different B.P.

Question 22

22. Acetylene had a characteristic ethereal smell resembling that of

Question 23

23. C₄H₈ can show isomerism

Answer

Structural

Answer

Functional group

Question 24

24. In benzene carbon – carbon bonds are

Answer

Of the order 1.5

Answer

Single covalent

Answer

3 single and 3 double

Answer

Double covalent

Question 25

25. Coal is obtained from dead remains of

Answer

Both a and b

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. Geometry of simple molecule having sp3 hybrid orbital is

Answer

Square planner

Answer

Triangular

Answer

Tetrahedral

Question 28

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

Answer

Natural gas

Question 29

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

Answer

Conformers

Answer

Enantiomers

Answer

Diastereomers

Answer

Positional isomers

Question 30

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

Question 31

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

Question 32

32. The major portion of natural oil is

Question 33

33. A π (pi) bond is the result of the

Answer

Overlap of two s orbitals

Answer

Overlap of two p orbitals along their axes

Answer

Overlap of an s and a p orbital

Answer

Sidewise overlap of two parallel p orbitals

Question 34

34. The next homologue of C₁₀H₂₂ will be

Answer

C₁₂H₂₆

Answer

C₉H₂₀

Answer

C₁₃H₂₈

Answer

C₁₁H₂₄

Question 35

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

Answer

Carbon forming long chain or rings

Answer

Ionic properties

Answer

Chemical forces

Question 36

36. Pi bonds are produced by overlapping of

Answer

Un-hybrid orbitals

Answer

Atomic orbital and hybrid orbital

Answer

Hybrid orbitals

Answer

Hybrid and un hybrid orbitals

Question 37

37. Wholer prepared urea from

Question 38

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

Answer

Ammonium cyanate

Question 39

39. Which one has zero octane number?

Answer

n – Heptane

Answer

n – Hexane

Answer

iso – octane

Question 40

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

Answer

Ethyl hydrogen sulphate

Answer

Methyl hydrogen sulphate

Answer

Methyl alcohol

Answer

Ethyl alcohol

Question 41

41. 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 42

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

Answer

NH₄⁺ - tetrahedral

Answer

SiCl₆²¯ -trigonal bipyramidal

Answer

ClO₂ - angular

Answer

PH₄⁺ - tetrahedral

Question 43

43. The components of petroleum can be separated due to

Answer

Having different physical states

Answer

Having different B.P.

Answer

Having different chemical properties

Answer

Having different M.P.

Question 44

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

Question 45

45. An isomer of ethanol is:

Answer

Diethyl ether

Answer

Dimethyl ether

Question 46

46. Ether shows the phenomenon of

Answer

Metamerism

Answer

Position isomerism

Answer

Chain isomerism

Answer

Cis – trass isomerism

Question 47

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

Question 48

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

Answer

Antheracite

Question 49

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

Question 50

50. In which molecule carbon atom is sp² hybridized

Answer

None of these

Question 51

51. The active part in a molecule is called:

Answer

Chemical bonding

Answer

Functional group

Answer

Ionic complex

Answer

Homologous series

Question 52

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

Answer

Hydrogen sulphides

Question 53

53. The self-linking of carbon atoms is called

Answer

None of these

Answer

Catenation

Question 54

54. The functional group isomer of dimethyl –ether is

Answer

Prophyl alcohol

Answer

Ethyl alcohol

Answer

Diethyl pether

Answer

Butyl alcohol

Question 55

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

Question 56

56. Which of the following has linear shape?

Answer

None of these

Question 57

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

Answer

Reforming process

Answer

Hydrogenation

Question 58

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

Question 59

59. The structure of benzene is

Answer

Square planer

Answer

Tetrahedral

Question 60

60. In C₂H₂ carbon-carbon bond angle is

Question 61

61. Which is the solid form of petroleum?

Question 62

62. Which of the following contains single bonds?

Question 63

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

Question 64

64. The open chain organic compounds are called

Answer

Linear compounds

Answer

Both A and B

Answer 139

C₂H₂Cl₂

Answer 140

Type of Bonding

Answer 141

Shape and Type of bonding

Answer 142

None of these

Answer 143

NO₂¯ - trigonal palnar

Answer 144

ClO₄¯ - tetrahedral

Answer 145

SO₃²¯ - pyramidal

Answer 146

ClO₃¯-tetrahedral

Answer 147

NH₃ - tetrahedral

Answer 148

CF₄ - tetrahedral

Answer 149

PF₃ - pyramidal

Answer 150

H₂O – tetrahedral

Answer 151

Addition reactions

Answer 152

Polymerization

Answer 153

Substitution reactions

Answer 154

Condensation reactions

Answer 155

Anthracite

Answer 156

-CHO group

Answer 157

- OH group

Answer 158

+NH₂ group

Answer 159

-CH₃ group

Answer 160

C₆H₁₂O₆

Answer 161

(C₆H₁₀O₅)n

Answer 162

CaSO₄. 0.5H₂O

Answer 163

Ethyl alcohol

Answer 164

Ethyl hydrogen sulphate

Answer 165

Methyl hydrogen sulphate

Answer 166

Methyl alcohol

Answer 167

Mostly ionic in character

Answer 168

Rates of reactions are very fast

Answer 169

They possess particular properties

Answer 170

In which atoms of C are in a series

Answer 171

Not in a series

Answer 172

None of these

Answer 173

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

Answer 174

None of these

Answer 175

Carbohydrates

Answer 176

The combustion product, lead causes air pollution

Answer 177

It damages the engine

Answer 178

It is costly

Answer 179

Pb is difficult to obtain in bulk qualities

Answer 180

Crystallization

Answer 181

Vapourization

Answer 182

One p-orbital is involved

Answer 183

One s and 3 p-orbitals are involved

Answer 184

All p-orbitals are involved

Answer 185

Four p-orbitals are involved

Answer 186

Tetrahedron

Answer 187

Both bonds are broken

Answer 188

Sigma bond is broken

Answer 189

Pi bond is broken

Answer 190

None of these

Answer 191

Anthracene

Answer 192

Cyclohexanol

Answer 193

90° and 180°

Answer 194

120° only

Answer 195

45° and 90°

Answer 196

90° and 120°

Answer 197

Dsp²-hybridization

Answer 198

Sp-hybridization

Answer 199

Sp²-hybridization

Answer 200

Sp³-hybridization

Answer 201

Sulphonation

Answer 202

Alkylation

Answer 203

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

Answer 204

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

Answer 205

Alkenes do not undergo addition reactions

Answer 206

Towards the addition reaction alkenes are more reactive than alkynes

Answer 207

Natural gas

Answer 208

All atoms in the ring are carbon

Answer 209

All atoms are SP³ -hybridized

Answer 210

May be other atoms

Answer 211

All atoms are SP² -hybridized

Answer 212

Para-magnetic

Answer 213

Un-saturated

Answer 214

Cis-trans isomerism

Answer 215

Position isomerism

Answer 216

Functional group isomerism

Answer 217

Metamerism

Answer 218

Saturated hydrocarbons

Answer 219

Compounds of S

Answer 220

Unsaturated hydrocarbon

Answer 221

Ethanoic acid

Answer 222

0¯ bond required less energy to be rotated

Answer 223

The bond angle is 109.5°

Answer 224

Alkanes possess three groups attached to each carbon

Answer 225

0¯ bond is stronger than A-bond

Answer 226

Reaction with aq KOH

Answer 227

Reaction with alcoholic KOH

Answer 228

Same molecular weights

Answer 229

The same vapour density

Answer 230

The same viscosity

Answer 231

Different molecular weights

Answer 232

cis – trans isomerism

Answer 233

Functional group isomerism

Answer 234

Metamerism

Answer 235

Position isomerism

Answer 236

C, H, and O only

Answer 237

C and S only

Answer 238

C and H only

Answer 239

C, H, O and N only

Answer 240

None-reactive

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