Advertisement Remove all ads

Whenever a Reaction Between an Oxidising Agent and a Reducing Agent is Carried Out, a Compound of Lower Oxidation State is Formed If the Reducing Agent is in Excess and a Compound of Higher Oxidation State is Formed If the Oxidising Agent is in Excess. Justify this Statement Giving Three Illustrations. - Chemistry

Whenever a reaction between an oxidising agent and a reducing agent is carried out, a compound of lower oxidation state is formed if the reducing agent is in excess and a compound of higher oxidation state is formed if the oxidising agent is in excess. Justify this statement giving three illustrations.

Advertisement Remove all ads

Solution

Whenever a reaction between an oxidising agent and a reducing agent is carried out, a compound of lower oxidation state is formed if the reducing agent is in excess and a compound of higher oxidation state is formed if the oxidising agent is in excess. This can be illustrated as follows:

(i)P4 and F2 are reducing and oxidising agents respectively.

If an excess of P4 is treated with F2, then PF3 will be produced, wherein the oxidation number (O.N.) of P is +3.

However, if P4 is treated with an excess of F2, then PF5 will be produced, wherein the O.N. of P is +5.

(ii)K acts as a reducing agent, whereas O2 is an oxidising agent.

If an excess of K reacts with O2, then K2O will be formed, wherein the O.N. of O is –2.

However, if K reacts with an excess of O2, then K2O2 will be formed, wherein the O.N. of O is –1.

(iii)C is a reducing agent, while O2 acts as an oxidising agent.

If an excess of C is burnt in the presence of insufficient amount of O2, then CO will be produced, wherein the O.N. of C is +2.

On the other hand, if C is burnt in an excess of O2, then CO2 will be produced, wherein the O.N. of C is +4.

 

  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

NCERT Class 11 Chemistry Textbook
Chapter 8 Redox Reactions
Q 11 | Page 273
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×