Chapter 9.2, Problem 3QQ

Interpretation Introduction

Interpretation:

From the given chemical reactions, nonredox reaction has to be identified

Concept Introduction:

Oxidation:

Loss of electrons from an atom ion or molecule during a chemical reaction is known as oxidation.  Oxidation state of atom ion or molecule will increase in this process.  In simple it is the addition of oxygen.

Example:

Here ${\text{Fe}}^{\text{2+}}$ oxidized to ${\text{Fe}}^{\text{3+}}$ by the removal of a single

Reduction:

Gaining of electrons from an atom, ion or molecule during a chemical reaction is known as reduction.  Oxidation state of an atom will increase in this process.  In simple it is the addition of hydrogen.

Example:

  ${\text{Fe}}^{\text{3+}}{\text{+e}}^{\text{-}}\to {\text{Fe}}^{\text{2+}}$

Here ${\text{Fe}}^{\text{3+}}$ reduced to ${\text{Fe}}^{\text{2+}}$ by gaining electrons.

Redox reactions:

It is a type of reaction in which both oxidation and reduction happens simultaneously.  One get oxidized and one get reduced

Example

  ${\text{Zn(s)+2H}}^{\text{+}}\text{(aq)}\to {\text{Zn}}^{\text{2+}}{\text{(aq)+H}}_{\text{2}}\text{(g)}$

  Zn is oxidized and hydrogen is reduced here

Nonredox reactions:

It is a type of reaction in which no transfer of electrons from one reactant to another reactant.

Example

  $\text{NaOH+HCl}\to {\text{NaCl+H}}_{\text{2}}\text{O}$