Chapter 22, Problem 22.172CP

(a)

Interpretation Introduction

To write:

One example of covalent network solid

(b)

Interpretation Introduction

To write:

One example of disproportionation reaction.

(c)

Interpretation Introduction

To write:

One example of paramagnetic oxide

(d)

Interpretation Introduction

To write:

One example of polar molecule that violates the octet rule

(e)

Interpretation Introduction

To write:

One example of a Lewis acid.

(f)

Interpretation Introduction

To write:

One example of an amphoteric oxide

Explanation: An amphoteric compound can act both as an acid or base.
${\text{Al}}_{\text{2}}{\text{O}}_{\text{3}}$ is an example of an amphoteric compound. ${\text{Al}}_{\text{2}}{\text{O}}_{\text{3}}\text{ + 6 HF }\to {\text{ 2 AlF}}_{\text{3}}{\text{ + 3 H}}_{\text{2}}\text{O}$ (here ${\text{Al}}_{\text{2}}{\text{O}}_{\text{3}}$ acts as a base)
${\text{Al}}_{\text{2}}{\text{O}}_{\text{3}}{\text{ + 2 NaOH + 3 H}}_{\text{2}}\text{O }\to \text{ 2 NaAl}{\left(\text{OH}\right)}_{\text{4}}$ ( here ${\text{Al}}_{\text{2}}{\text{O}}_{\text{3}}$ acts as an acid)
(g)

To write:

One example of semiconductor

(h)

Interpretation Introduction

To write:

One example of strong oxidising agent

(i)

Interpretation Introduction

To write:

One example of allotropes