Chapter 18.8, Problem 18.8CP

(a)

Interpretation Introduction

Interpretation:

See the location of the elements A,B and C in given periodic table.  Formula of highest oxidation state of these elements has to be written.

Concept Introduction:

Oxidation state:

Oxidation state or number is defined as formal charge on an atom in an ion or molecule.

(b)

Interpretation Introduction

Interpretation:

Among ${\text{Li}}_{\text{2}}\text{O}$, ${\text{Ga}}_{\text{2}}{\text{O}}_3$ and ${\text{CO}}_2$, most ionic oxide and most covalent oxide has to be predicted.

Concept Introduction:

Oxidation state:

Ionic compound: A compound which consist of anions and cations held together by ionic bond (electrical attraction of opposite charges).

Covalent compound: The chemical bond in which two atoms of the molecule share a pair of electrons with each other called polar covalent bond.

(c)

Interpretation Introduction

Interpretation:

Among ${\text{Li}}_{\text{2}}\text{O}$, ${\text{Ga}}_{\text{2}}{\text{O}}_3$ and ${\text{CO}}_2$, most acidic and most basic oxide has to be predicted.

Concept Introduction:

We know that basic character decrease and acidic character increases from left to right and from bottom to top in the periodic table.

(d)

Interpretation Introduction

Interpretation:

An oxide ion react with both ${\text{H}}^{\text{+}}$ and ${\text{OH}}^{\text{-}}$ has to be predicted.