RevisionDojo

S2.2 The covalent model - IB Questionbank | RevisionDojo

Practice S2.2 The covalent model with authentic IB Chemistry exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like atomic structure, chemical reactions, and organic chemistry. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.

Paper

Level

Question 1

SL & HLPaper 1A

Which is correct for the structure shown?

I. The substance has a network covalent structure

II. The substance is a poor conductor of electricity

III. The atoms have a tetrahedral arrangement

Question 2

SL & HLPaper 1A

What type of bond is formed when two non-metals share electrons?

Question 3

SLPaper 1A

Which substance dissolves in water to form a solution that does not conduct electricity?

Question 4

HLPaper 1A

Which set correctly describes the bonding and molecular shape of the carbonate ion, $\mathrm{CO}_3^{2-}$ ?

Question 5

SLPaper 2

Carbon is an element with several allotropes, each with distinct physical and electrical properties. Two common forms are diamond and graphite, which have very different uses in technology and industry.

Describe the bonding and structure of diamond in terms of its geometry and bonding type.

[2]

Describe the bonding and structure of graphite and how its layers are arranged.

[2]

Explain, in terms of electronic structure, why graphite conducts electricity whereas diamond does not.

[2]

State one technological use for each allotrope and relate it to a property explained above.

[2]

Question 6

SLPaper 2

Hydrogen cyanide ( $\text{HCN}$ ) is a toxic gas used in chemical synthesis and historically known for its lethal effects. Understanding its bonding and polarity helps explain its reactivity and behavior in biological systems.

Draw the Lewis (electron dot) structure of $\text{HCN}$ , showing all bonds and lone pairs.

[1]

Predict the molecular geometry of the molecule using VSEPR theory.

[1]

Explain whether $\text{HCN}$ is a polar molecule, referring to bond polarity and molecular geometry.

[2]

Suggest how the polarity of $\text{HCN}$ influences its solubility in water.

[1]

Question 7

HLPaper 1A

What is the formal charge of the oxygen atom in $\mathrm{H_3O^+}$ ?

Question 8

HLPaper 1A

Which species has the longest carbon to oxygen bond length?

Question 9

SL & HLPaper 1A

Which of the following molecules is non-polar?

Question 10

SL & HLPaper 1A

Consider the Lewis formula of HCl.

Which statement is correct?

Paper

Level

Question 1

SL & HLPaper 1A

Which is correct for the structure shown?

I. The substance has a network covalent structure

II. The substance is a poor conductor of electricity

III. The atoms have a tetrahedral arrangement

Question 2

SL & HLPaper 1A

What type of bond is formed when two non-metals share electrons?

Question 3

SLPaper 1A

Which substance dissolves in water to form a solution that does not conduct electricity?

Question 4

HLPaper 1A

Which set correctly describes the bonding and molecular shape of the carbonate ion, $\mathrm{CO}_3^{2-}$ ?

Question 5

SLPaper 2

Describe the bonding and structure of diamond in terms of its geometry and bonding type.

[2]

Describe the bonding and structure of graphite and how its layers are arranged.

[2]

Explain, in terms of electronic structure, why graphite conducts electricity whereas diamond does not.

[2]

State one technological use for each allotrope and relate it to a property explained above.

[2]

Question 6

SLPaper 2

Draw the Lewis (electron dot) structure of $\text{HCN}$ , showing all bonds and lone pairs.

[1]

Predict the molecular geometry of the molecule using VSEPR theory.

[1]

Explain whether $\text{HCN}$ is a polar molecule, referring to bond polarity and molecular geometry.

[2]

Suggest how the polarity of $\text{HCN}$ influences its solubility in water.

[1]

Question 7

HLPaper 1A

What is the formal charge of the oxygen atom in $\mathrm{H_3O^+}$ ?

Question 8

HLPaper 1A

Which species has the longest carbon to oxygen bond length?

Question 9

SL & HLPaper 1A

Which of the following molecules is non-polar?

Question 10

SL & HLPaper 1A

Consider the Lewis formula of HCl.

Which statement is correct?

Paper

Level

Question 1

SL & HLPaper 1A

Which is correct for the structure shown?

I. The substance has a network covalent structure

II. The substance is a poor conductor of electricity

III. The atoms have a tetrahedral arrangement

Question 2

SL & HLPaper 1A

What type of bond is formed when two non-metals share electrons?

Question 3

SLPaper 1A

Which substance dissolves in water to form a solution that does not conduct electricity?

Question 4

HLPaper 1A

Which set correctly describes the bonding and molecular shape of the carbonate ion, $\mathrm{CO}_3^{2-}$ ?

Question 5

SLPaper 2

Describe the bonding and structure of diamond in terms of its geometry and bonding type.

[2]

Describe the bonding and structure of graphite and how its layers are arranged.

[2]

Explain, in terms of electronic structure, why graphite conducts electricity whereas diamond does not.

[2]

State one technological use for each allotrope and relate it to a property explained above.

[2]

Question 6

SLPaper 2

Draw the Lewis (electron dot) structure of $\text{HCN}$ , showing all bonds and lone pairs.

[1]

Predict the molecular geometry of the molecule using VSEPR theory.

[1]

Explain whether $\text{HCN}$ is a polar molecule, referring to bond polarity and molecular geometry.

[2]

Suggest how the polarity of $\text{HCN}$ influences its solubility in water.

[1]

Question 7

HLPaper 1A

What is the formal charge of the oxygen atom in $\mathrm{H_3O^+}$ ?

Question 8

HLPaper 1A

Which species has the longest carbon to oxygen bond length?

Question 9

SL & HLPaper 1A

Which of the following molecules is non-polar?

Question 10

SL & HLPaper 1A

Consider the Lewis formula of HCl.

Which statement is correct?

S2.2 The covalent model Questionbank