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WAEC questions for "Chemistry :: Bonding"
Q1

Which of the following properties of covalent compounds is not correct? They

A

are non-electrolytes

B

are mostly gaseous and volatile liquids

C

have low melting points

D

have high boiling points

E

Answer: D

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Q2

Which of the following molecules is not linear in shape?

A

CO2

B

O2

C

NH3

D

HCl

E

Answer: C

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Q3

In bonded atoms, increase in electronegativity difference,

A

increase polarity

B

decreases polarity

C

has no effect on polarity

D

oxidation number

E

Answer: A

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Q4

Water molecules are held together by

A

covalent bond

B

hydrogen bond

C

ionic force

D

van der waals force

E

Answer: B

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Q5

The compound formed by two elements X and Y with the electronic configuration 1s22s22p4and 1s22s22p63p2respectively is

A

XY

B

YX

C

X2Y3

D

Y2X3

E

Answer: B

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Q6

The force of attraction between covalent molecules is

A

dative bonding

B

hydrogen bonding

C

ionic force

D

van der waals

E

Answer: B

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Q7

If the difference between the electronegativity of two elements is large, the type of bond that can be formed between them is

A

covalent

B

dative

C

ionic

D

metallic

E

Answer: C

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Q8

Which of the following species does not contain a co-ordinate bond?

A

Al2Cl6

B

CCl

C

H3O+

D

NH4+

E

Answer: B

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Q9

Which of the following compounds has a hydrogen bonds between its molecules?

A

HF

B

HBr

C

HCl

D

HI

E

Answer: A

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Q10

The atomic numbers of elements X and Y are 20 and 17 respectively. Which of the following compound is likely to be formed by the combination of the two elements?

A

XY

B

XY2

C

XY3

D

X2Y

E

Answer: B

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Q11

What type of bond will be formed between P and Q if their electronegativity are 0.8 and 0.4 respesctively?

A

Covalent bond

B

Co-ordinate covalent bonding

C

Ionic bonding

D

Metallic bonding

E

Answer: C

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Q12

What type of chemical bonding is involved in the formation of NH+4 from a molecule of ammonia and a proton?

A

Covalent bonding

B

Co-ordinate covalent bonding

C

Electrovalent bonding

D

Hydrogen bonding

E

Answer: B

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Q13

What is responsible for metallic bonding?

A

Attraction between delocalized electron and fixed positive lattice points (cations)

B

Attraction between positive and negative ions

C

Sharing of electrons between the metal atoms

D

Transfer of electrons from one atom to another

E

Answer: A

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Q14

The type of bonding between calcium and oxygen in calciumoxide is

A

metallic

B

covalent

C

ionic

D

co-ordinate covalent

E

Answer: C

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Q15

The properties of four compounds P, Q, R and S are shown in the table below. Which of them is ionic?

Compound Electrical conductance in the molten state Melting Point
A. P Fairly good 28C
B. Q
Nil 97C
C. R
Poor 158C
D. S Fair good 2015C

A

Fairly good 28C

B

Nil 97C

C

Poor 158C

D

Fairly good 2015C

E

Answer: D

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Q16

Which of the following can be used to predict the type of bonding in HCl?

A

pH value

B

Electronegativity difference

C

Heat of neutralization

D

Heat of solution

E

Answer: B

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Q17

Which of the following has a linear structure?

A

NH3

B

H2O

C

CO2

D

CH4

E

Answer: C

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Q18

What type of bonding exist between X and chlorine in each of the chloride?

A

Metallic bonding

B

Ionic bonding

C

Covalent bonding

D

Dative bonding

E

Answer: B

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Q19

Which of the following statements about dative bonding is not correct?

A

There is sharing of electrons

B

One atom must possess a lone pair of electrons

C

Each participating atom contributes one electron

D

It can be formed between molecules

E

Answer: B

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Q20

What letter represents an element tha participates in covalent rather than ionic bonding?

A

X

B

Q

C

Z

D

J

E

Answer: A

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Q21

What is responsible for metallic bonding?

A

Sharing of electrons between the metal atoms

B

Attraction between the atomic nuclei and cloud of electrons

C

Transfer of electrons from one atoms to another

D

Attraction between positive and negative ions

E

Answer: B

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Q22

Which of the following compounds is covalent?

A

CaCl2

B

MgO

C

NaH

D

CH4

E

Answer: D

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Q23

Electrovalent compounds are charaterised by

A

solubility in ethanol

B

high molar mass

C

high melting point

D

strong oxidizing ability

E

Answer: C

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Q24
The type chemical bond that exist between potassium and oxygen in potassium oxide is
A
ionic
B
metallic
C
covalent
D
dative
E

Answer: A

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Q25

Which of the following contains co-ordinate covalent bond?

A

HCl

B

CH4

C

NH+4

D

Na+Cl-

E

Answer: C

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Q26

Electrostatic forces of attraction between sodium ion and halide ion is greatest in

A

NaCl

B

NaBr

C

NaF

D

NaI

E

Answer: C

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Q27

What is the shape of a molecule of CCl4?

A

Pyramidal

B

Tetrahedral

C

Trigonal planar

D

linear

E

Answer: B

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Q28

The crystal layers in the graphite are held together by

A

electrostatic forces

B

Van der Waals forces

C

hydrogen bonds

D

covalent bonds

E

Answer: B

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Q29

If an element with high electron affinity combines with another element with low ionization energy, the bond formed will be mainly

A

covalent

B

ionic

C

dative

D

metallic

E

Answer: B

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Q30

In linear molecule, the bond angle is

A

90

B

104

C

109

D

120

E

180

Answer: E

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Q31

Which of the following molecules is linear in shape?

A

CH4

B

H2O

C

NH3

D

H2S

E

Cl2

Answer: E

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Q32

Which of the following molecules is/are linear in shape?

I N2

II CO2

III NH3

IV H2O

A

IV

B

I and II

C

III and IV

D

I, II and III

E

I, II, III and IV

Answer: B

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Q33
The following compounds contain the same type of bonds except
A
sodium chloride
B
hydrogen chloride
C
magnesium chloride
D
potassium chloride
E
lithium chloride

Answer: B

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Q34

All members of a homologous series

I conform to a general molecular formular

II Show similar similar chemical properties

III can be obtained by a general method of preparation

IV have the same physical

A

IV

B

I and II

C

III and IV

D

I, II and III

E

I, II, III and IV

Answer: D

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Q35
The properties of electrovalent compounds include the following except
A
high melting point and boiling point
B
conduction of electricity in the molten state
C
high volatility at room temperature
D
ionization in aqueous solution
E
decomposition of their solutions by electric current

Answer: C

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Q36

Which of the following compound has the highest ionic character?

A

KCl(s)

B

BeCl2(s)

C

HCl(g)

D

AlCl3(g)

E

CaCl2(g)

Answer: A

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Q37

The crystal layer in graphite are held together by

I ionic bond

II dipole bond

III electrostatic forces

IV Van der waals forces

A

IV

B

I and III

C

III and IV

D

I, II and III

E

I, II, III and IV

Answer: A

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Q38

Which of the following groups contains entirely linear molecules?

A

H2, NH3, O2

B

CO2, NH3, N2

C

H2, CH4, N2

D

CO2, H2, N2

E

CH4, O2, CO2

Answer: D

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Q39

Which of the following is not a characteristic of electrovalent compounds?

A

Formation of crystalline solid

B

Solubility in polar solvents

C

High vapour pressure

D

High melting and boiling point

E

Ability to conduct electricity in aqueous solution

Answer: C

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Q40

In which of the following crystals are the particles held by Van der Waal's forces only?

A

Sodium chloride

B

Ice

C

Diamond

D

Iodine

E

Quartz

Answer: D

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Q41

Which of the following types of hybridization gives rise to tetrahedral molecules

A

sp

B

sp2

C

sp3

D

sp3d

E

sp3d2

Answer: C

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