Chapter 8, Problem 68AP

a)

Interpretation Introduction

Interpretation:

Whether in violet solution of vanadium(II) ions, (aq), is converted to a green solution of undergoes oxidation, reduction or neither should be determined.

Concept Introduction:

Oxidation number determines whether a reaction is oxidation-half or the reduction-half.
The reaction in which the oxidation number of an element decreases is called reduction. The reaction in which the reduction number of an element increases is called oxidation. Both the oxidation and reduction process takes place simultaneously.

b)

Interpretation Introduction

Interpretation:

Whether nitrogen dioxide in conversion of nitrogen dioxide to dinitrogen tetroxide undergoes oxidation, reduction or neither should be determined.

Concept Introduction:

Oxidation number determines whether a reaction is oxidation-half or the reduction-half.
The reaction in which the oxidation number of an element decreases is called reduction. The reaction in which the reduction number of an element increases is called oxidation. Both the oxidation and reduction process takes place simultaneously. Oxidation state of Oxygen = - 2

c)

Interpretation Introduction

Interpretation:

Whether carbon monoxide on reacting with hydrogen to from methanol undergoes oxidation, reduction or neither should be determined.

Concept Introduction:

Oxidation number determines whether a reaction is oxidation-half or the reduction-half.
The reaction in which the oxidation number of an element decreases is called reduction. The reaction in which the reduction number of an element increases is called oxidation. Both the oxidation and reduction process takes place simultaneously.
Oxidation state of Oxygen = - 2