Chapter 19, Problem 19.28SP

(a)

Interpretation Introduction

Interpretation:

Among the given pair, ${\text{CaH}}_{\text{2}}\text{or}{\text{NH}}_{\text{3}}$, the compound which is more ionic has to be identified.

Concept introduction:

On moving down the group, Metallic character of any metal increases so definitely Ionic character of any metal oxide increases.

Electronegativity decreases down the group, so the Ionic character of their hydride increases.

(b)

Interpretation Introduction

Interpretation:

Among the given pair, ${\text{P}}_{\text{4}}{\text{O}}_{\text{6}}\text{or}{\text{Ga}}_{\text{2}}{\text{O}}_{\text{3}}$, the compound which is more ionic has to be identified.

Concept introduction:

On moving left to right in a period, metallic nature decreases.

Electronegativity decreases down the group, so the Ionic character of their hydride increases.

(c)

Interpretation Introduction

Interpretation:

Among the given pair, ${\text{SiCl}}_{\text{4}}\text{or}\text{KCl}$, the compound which is more ionic has to be identified.

Concept introduction:

On moving down the group, Metallic character of any metal increases so definitely Ionic character of any metal oxide increases.

On moving left to right in a period, metallic nature decreases.

Electronegativity decreases down the group, so the Ionic character of their hydride increases.

(d)

Interpretation Introduction

Interpretation:

Among the given pair, ${\text{BCl}}_{\text{3}}\text{or}{\text{AlCl}}_{\text{3}}$, the compound which is more ionic has to be identified.

Concept introduction:

On moving down the group, Metallic character of any metal increases so definitely Ionic character of any metal oxide increases.

Electronegativity decreases down the group, so the Ionic character of their hydride increases.