Chemistry of Carbon Compounds Generix Content - Chemistry of Carbon Compounds
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WAEC questions for "Chemistry :: Chemistry of Carbon Compounds"
Q1

The seperation of petroleum fractions depends on the differences in their

A

boiling points

B

molar masses

C

melting points

D

solubilities

E
Q2

Which of the following raw material is used in the plastic theory?

A

Calcium

B

Ethene

C

Hydrogen

D

Methane

E
Q3

The product of the reaction between C2H5OH and concentrated H2SO4 at 170°C is

A

(C2H5)2SO4

B

CH3CH2HSO4

C

(C2H5)2O

D

CH2 = CH2

E
Q4

When protein is heated to a high temperature it undergoes

A

condensation

B

denaturation

C

hydrolysis

D

polymerization

E
Q5

What is the molecular formular of a compound with empirical formular CH2O and vapour density of 90? [H = 1, C = 12, O = 16]

A

C4H8O2

B

C4H8O3

C

C6H10O5

D

C6H12O6

E
Q6

What is the product of the reaction between propene and 1mole of hydrogen iodide?

A

CH3CHICH3

B

CH3CH2CHI2

C

CH3CH2Cl3

D

CH3CHICH2I

E
Q7

Ethanol reacts with excess acidified K2Cr2O7 to produce

A

ethanal

B

ethane

C

ethanoic acid

D

ethylethanoate

E
Q8

Dry hydrogen chloride when dissolved in methyl bezene

A

turns blue litmus paper red

B

turns red litmus paper blue

C

does not affect litmus paper

D

bleaches litmus paper

E
Q9

A mixture of kerosene and diesel oil can be separated by

A

crystallization

B

distillation

C

precipitation

D

sublimation

E
Q10

Which of the following compound would not give a precipitate with ammoniacal AgNO3 solution?

A

CHC≡ CCH3

B

HC ≡ CH

C

CH3C ≡ CH

D

CH3CHCH2 ≡ CH

E
Q11

When ethanol is heated with excess concentrated tetraoxosulphate (VI) acid, the organic product formed is

A

ethanal

B

ethanoic acid

C

ethane

D

ethene

E
Q12

The hydrolysis of groundnut oil by potassium hydroxide is known as

A

hydrogenation

B

saponification

C

esterification

D

neutralization

E
Q13

Arrange the following compounds in order of increasing boiling point

I   CH3CH2CH2OH

II  CH3CH2OH

III CH3CH2CH2CH2OH

IV  CH3CH2CH2CH2CH3

A

I

B

IV

C

I

D

IV

E
Q14

What is the main type of reaction alknenes undergo?

A

Addition

B

Condensation

C

Elimination

D

Sustitution

E
Q15

A hydrocarbon containing 88.9% carbon has the empirical formula [H = 1, C = 12]

A

CH

B

CH2

C

C2H3

D

C2H5

E
Q16

Which of the following substances is a suitable solvent for perfumes?

A

Benzene

B

Ethanol

C

Turpentine

D

Water

E
Q17

The complete hydrogenation of C6H6 in the presence of nickel catalyst at 200°C gives

A

C6H8

B

C6H10

C

C6H12

D

C6H14

E
Q18

Which of the following pairs of substances can be distinguished by use of NaHCO3 solution?

A

CH3CH2OH and HCOOCH3

B

CH3CH2OH and CH3COOH

C

CH3COOH and HCOOH

D

CH3CH2OH and CH3OH

E
Q19

Alkenes undergo the following reactions except

A

addition

B

hydration

C

polymerization

D

substitution

E
Q20

Hydrocarbon which reacts with ammoniacal copper (I) chloride solution conform to the general molecular formular

A

CnHn

B

CnH2n

C

CnH2n+2

D

CnH2n

E
Q21

Consider the reaction below

  H2:Ni Catalyst  
Vegetable oil  →  Product
  High temperature  
The reaction is applied in the manufacture of

A

drugs

B

margarine

C

paraffin wax

D

soapy detergents

E
Q22

What is the product of the reaction between ethanol and excess acidified KMnO4 solution?

A

CH2 = CH2

B

CH3COOH

C

CH3 - CH3

D

CH3OCH3

E
Q23

Glucose reduces Fehlin's solution on warming to

A

Copper (I) oxide

B

Copper (II) oxide 

C

Copper (I) chloride

D

Copper (II) hydroxide

E
Q24

Which of the following compounds reacts readily with sodium to liberate hydrogen?

A

CH3CH2CH3

B

CH3COCH3

C

CH3CH(OH)CH3

D

CH3CH2CHO

E
Q25

The name of the compound is

A

2, 3-dimethylbutane-1-ol.

B

2, 3-dimethylbutan-4-ol

C

2-methylbutane-1-ol

D

3-methylbutanol-1-ol

E
Q26

The product of the complete oxidation of the compound will be an

A

alkane

B

alkanal

C

alkanoic acid

D

alkanone

E
Q27

What type of reaction occurs between vegetable oil and plant ash extract?

A

Displacement

B

Dehydration

C

Neutralization

D

Saponification

E
Q28

Which of the following compounds is an alkanoate?

A

CH3COOH

B

CH3COOCH3

C

CH3CH2OH

D

CH3CH2COOH

E
Q29

What is CaHb in the following equation? CaHb + 5O2 → 3CO2 + 4H2O

A

C3H4

B

C3H6

C

C3H8

D

C5H10

E
Q30

Which of the following equations represents a substitution reaction?

A

C4H10 + Cl2(g) → C4H9Cl(g) + HCl(g)

B

C2H4(g) + HCl(g) → C2H5Cl(l) 

C

C2H2(g) + 2H2(g) → C2H6(g)

D

C3H4(g) + 4O2(g) → 3O2(g) + 2HCl(g)

E
Q31

Reactions undergone by compounds with the general formular CnH22 → C2H5 + C2H4 + X

A

propyne

B

propanol

C

propene

D

propane

E
Q32

What is the major product formed when C2H5OH reacts with CH3COOH?

A

C2H5COOCH3

B

C2H5COOCH3

C

CH3COOC2H5

D

C3H7COOH

E
Q33

Which of the following substances is a non-reducing sugar?

A

Sucrose

B

Glucose

C

Fructose

D

Maltose

E
Q34

The colour of the solution formed when ethyne reacts with an acidic solution of potassium tetraoxomanganate (VII)

A

purple

B

colourless

C

green

D

pink

E
Q35

Fats are classified as

A

hydrocarbons

B

alkanoates

C

alkanols

D

carbohydrates

E
Q36

Consider the reaction represented by the equation below: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) .How many moles of carbon (IV) oxide will be produced from 32g of methane? [H = 1, C = 12, O = 16]

A

2

B

3

C

4

D

8

E
Q37

Ethyne undergoes the following reactions except

A

polymerisation

B

addition

C

substitution

D

esterification

E
Q38

Which of the following compounds has the highest percentage of carbon? [H = 1, C = 12, O = 16]

A

C2H2

B

C2H4

C

C2H6

D

C2H6O

E
Q39

Which of the following pairs of solution will produce a precipitate when mixed?

A

Pb(NO3)2(aq) and NaCl(aq)

B

MgSO4(aq) and HCl(aq)

C

ZnCl2(aq) and NaSO4(aq)

D

NaOH(aq)  and HNO3(aq)

E
Q40

Glucose gives a brick red precipitate with Fehlin's solution because it is

A

a carbohydrate

B

an alkanoate

C

a reducing sugar

D

a non electrolyte

E
Q41

What is the IUPAC name of CH3CH2COOCH3

A

Ethylethanoate

B

Methylethanoate

C

Methylpropanoate

D

Prophylmethanoate

E
Q42

Which of the following compounds is a soapless detergent?

A

C12H25OSO3Na

B

C17H35COONa

C

C6H5OH

D

C4H9COOC2H5

E
Q43

The condensation of several amino acid molecules gives

A

long chain alkanoic acid

B

secondary alkanols

C

alkanoates

D

proteins

E
Q44

Which of the following petroleum fractions yields vaseline and paraffin wax redistillation?

A

Diesel oil

B

Lubrication oil

C

Petrol

D

Kerosene

E
Q45

What is the product CxHy in the following equaiton? C10H22 → C8H18 + CxHy

A

Butene

B

Octane

C

Ethene

D

Decane

E
Q46

Which of the following compounds has the same empirical formular as benzene?

A

C2H2

B

C2H4

C

C4H6

D

C6H12

E
Q47

A given fuel has an octane number of 100. This means that

A

the knocking tendency of fuel is low

B

the fuel is a mixture of several hydrocarbons

C

a large amount of alkanes is present in the fuel

D

the fuel needs to be cracked before use

E
Q48

Wine containing 8% to 17% ethanol can be converted to gin containing about 40% ethanol by

A

evaporation

B

distillation

C

fermentation

D

oxidation

E
Q49

Which of the following sustances could be responsible for the banana taste of a food flavour?

A

Methylbenzene

B

Butanol

C

Ethanol

D

Pentylethanoate

E
Q50

What is the organic product of the reaction of C2H5OH with excess acidified K2Cr2O7(aq)?

A

CH3COOH

B

C2H5OC2H

C

HCOOCH3

D

C2H5CHO

E
Q51

The reaction of vegetable oil with a solution of wood ash is

A

saponification

B

neutralization

C

Hydrogenation

D

esterification

E
Q52

What process does the following equation represent? (C6H1oO5)n + nH2O → nC6H12O6

A

Polymerization of glucose

B

Hydrolysis of starch

C

Fermentation of sugar

D

Dehydration of carbohydrates

E
Q53

When excess ethene is shaken with acidified KMnO4 solution, the product obtained is

A

ethane

B

ethanol

C

ethane -1, 2- diol

D

ethanoic acid

E
Q54

Which of the following processes takes place during the production of magarine from vegetable oils?

A

Esterification

B

Hydrolysis

C

Hydrogenation

D

Saponification

E
Q55

Which of the following ions compounds can be represented by the molecular formular C2H6O?

A

Propanal

B

Ethanol

C

Methanoic acid

D

Glucose

E
Q56

When alkynes are hydrogenated completely, they produce compounds with the general molecular formular

A

CnHn

B

CnH2n+2

C

CnH2n

D

CnH2n-2

E
Q57

The following compounds are hydrocarbons except

A

methyl propanoate

B

2-methylbutane

C

benzene

D

cyclohexane

E
Q58

The reaction between ethene and chlorine to form 1, 2-dichloroethane is

A

oxidation

B

polymerization

C

addition

D

substitution

E
Q59

Which of the following statements about soapless detergent is correct? They

A

lather readily with hard water

B

increase the surface tension of water

C

cause hydrolysis of salts in water

D

form a curdy precipitate with soft water

E
Q60

Which of the following types of alkanols undergo oxidation to produce alkanoic acids?

I   Primary alkanols

II  Secondary alkanols

III Tertiary alkanols

A

I, II and III

B

I and II only

C

II only

D

I only

E