Redox Reactions in terms of Electron Transfer-Oxidation and Reduction Reactions

Best JEE & NEET Physics, Chemistry, Biology, and Math Study Material – Anand Classes by Neeraj Anand (Published by Anand Technical Publishers)

If you are preparing for JEE Mains, JEE Advanced, or NEET, having the right study material can make all the difference. Anand Classes, authored by Neeraj Anand and published by Anand Technical Publishers, provides one of the most comprehensive, structured, and exam-oriented study materials for Physics, Chemistry, Biology, and Mathematics Subjects according to latest trends of JEE & NEET Entrance Exams.

Why Choose Anand Classes Study Material for JEE & NEET Preparation?

The study materials by Neeraj Anand are designed to simplify complex concepts, provide in-depth explanations, and offer ample practice questions to help students achieve top scores in competitive exams.

Comprehensive Coverage – Detailed explanations of Physics, Chemistry, Biology, and Mathematics concepts.
JEE & NEET Focused – Designed specifically for competitive exam success.
Solved Examples & Practice Questions – Strengthen your understanding with concept-based problems.
Short Tricks & Formulas – Easy-to-remember techniques for quick problem-solving.
Concept Clarity: Easy-to-understand theory with step-by-step explanations.
Topic-Wise Breakdown: Well-structured chapters following the latest syllabus of JEE Mains, JEE Advanced, and NEET.
Solved Examples & Practice Questions: Includes previous year questions (PYQs), important formulas, and shortcut techniques.
NCERT-Based & Advanced Level: Covers both board exam preparation and entrance exam syllabus for JEE & NEET aspirants.
Time-Saving Tricks: Quick formulas, memory techniques, and problem-solving strategies.

📚 Subjects Covered in Anand Classes Study Material

🔵 Physics (For JEE & NEET)

  • Kinematics & Laws of Motion
  • Work, Power & Energy
  • Gravitation & Fluid Mechanics
  • Thermodynamics & Heat Transfer
  • Electrostatics & Magnetism
  • Optics & Modern Physics
  • Semiconductor Electronics & Communication

🟠 Chemistry (For JEE & NEET)

Physical Chemistry

  • Mole Concept & Stoichiometry
  • Thermodynamics & Chemical Equilibrium
  • Electrochemistry & Chemical Kinetics

Inorganic Chemistry

  • Periodic Table & Chemical Bonding
  • Coordination Compounds & Metallurgy
  • P-Block, D-Block & F-Block Elements

Organic Chemistry

  • Hydrocarbons & Functional Groups
  • Reaction Mechanisms & Named Reactions
  • Biomolecules & Polymers

🟢 Biology (For NEET)

  • Diversity in the Living World
  • Cell Structure & Function
  • Genetics & Evolution
  • Human Physiology & Reproduction
  • Ecology & Environment

🔴 Mathematics (For JEE Mains & Advanced)

Permutation, Combination & Complex Numbers

Algebra & Probability

Trigonometry & Coordinate Geometry

Calculus (Differential & Integral)

Vectors & 3D Geometry

📥 Download PDF & Buy Now!

Get the Best JEE & NEET Study Material by Anand Classes today! Strengthen your concepts, practice with important questions, and boost your exam preparation.

🔗 Visit Anand Technical Publishers for more details!


This post is optimized with SEO keywords such as:

  • Best JEE NEET Study Material
  • Physics Chemistry Biology Math Study Notes
  • Anand Classes by Neeraj Anand
  • JEE Mains & NEET Preparation Books PDF
  • Best Books for JEE & NEET 2025


A variety of chemical and biological reactions like burning of different types of fuels (wood, kerosene, coal, LPG, petrol, diesel), digestion of food in animals, photosynthesis by plants, extraction of aluminum from alumina, electricity generation from batteries or cell, rusting of iron fall in the category of redox reaction.

What is a Redox Reaction?

Redox reaction is a type of chemical reaction in which oxidation and reduction take place simultaneously. It is the combination of two words that is reduction and oxidation. As shown in the below equation,  here sodium(Na) is oxidized as well as hydrogen(H) is reduced. So, their oxidation, as well as reduction, takes place simultaneously. It involves the transfer of electrons between two species. This reaction is used in pharmaceuticals, biological, industrial, metallurgical and agricultural areas.

For Example:

2Na + H2  → 2NaH

A variety of chemical and biological reactions like burning of different types of fuels (wood, kerosene, coal, LPG, petrol, diesel), digestion of food in animals, photosynthesis by plants, extraction of aluminum from alumina, electricity generation from batteries or cell, rusting of iron fall in the category of redox reaction.

Oxidation and Reduction

  • Oxidation: It is defined as the addition of oxygen/electronegative elements to a substance or removal of hydrogen/electropositive elements from a substance.

S (s) + O2 (g)   → SO2 (g)           [oxygen is added]

Mg (s) + Cl2 (g) → MgCl2 (s)     [electronegative element (Cl) is added]

  • Reduction: It is defined as the removal of oxygen/electronegative elements from a substance or addition of Hydrogen/electropositive elements to a substance.

CuO (s) + H2 (g)  → Cu (s) + H2O (l)                    [removal of oxygen]

2FeCl3 (aq) + H2 (g)  → 2FeCl2 (aq) + 2HCl      [removal of electronegative elements]

Redox Reaction on the basis of Electron Transfer

The chemical reaction in which the loss of electrons and gain of electrons take place simultaneously is called a redox reaction.

For Example: 

MnO4(aq) + SO32-(aq)  →  MnO42-(aq) + SO42-(aq)       [Mn gained 1 electron and S lost 2 electron]

As shown in the above equation, here magnesium(Mg) gained one electron, as well as Sulphur (S), lost two-electron. So, both oxidation as well reduction takes place simultaneously. This explains that the equation is an example of a redox reaction.

  • Oxidation reaction: The loss of electrons by any species in a chemical reaction is known as an oxidation reaction. By losing electrons, the positive charge of the species increases or the negative charge of the species decreases.

For Example,                         2Na   +    Cl2   →   2Na    +    Cl–                        

Oxidation state:                       0            0             +1           -1                

As shown in the above equation, the oxidation state of Sodium(Na) changed from 0 to 1 which means it lost one electron or the positive charge of Sodium(Na) is increased.

  • Reduction reaction: The gain of electrons by any species in a chemical reaction is known as a reduction reaction. By gaining electrons, the positive charge of the participating species decreases and the negative charge of the participating species increases.

For Example,                        2Na   +    Cl  →   2Na   +   Cl–                   

Oxidation state:                      0            0            +1          -1  

Here, Chlorine is an example of a reduction reaction as its oxidation state changed from 0 to -1 which means it gained one electron.

Applications of Redox reaction

  • In galvanic cells or voltaic cells, a Redox reaction is used to convert chemical energy into electrical energy.
A variety of chemical and biological reactions like burning of different types of fuels (wood, kerosene, coal, LPG, petrol, diesel), digestion of food in animals, photosynthesis by plants, extraction of aluminum from alumina, electricity generation from batteries or cell, rusting of iron fall in the category of redox reaction.
  • Redox reaction is also used by trees during photosynthesis.
  • Electroplating is done by using a Redox reaction.
  • Fertilizers, caustic soda etc. is prepared with the help of a Redox reaction.

Sample Questions

Question 1: Identify the species undergoing oxidation and reduction in the given equation-

H2S(g) + Cl2  → 2HCl(g) + S(s).

Answer: 

As chlorine (Cl) is an electronegative element and it is added to Hydrogen(H) so, H2S is oxidized. Hydrogen is added to chlorine (Cl), hence It is reduced.

Question 2: In the reaction MnO2 + 4HCl → MnCl2 + Cl2 +2H2O which species is oxidized ?

Answer: 

As addition of chlorine occurs in HCl. Hence, it is the oxidizing agent. 

Question 3: Why is the given reaction – CH4(g)+2O2(g) → CO2(g)+2H2O is an example of an oxidation reaction?

Answer:

As oxygen is being added in CH so, addition of oxygen signifies oxidation.

Question 4: Name the best reducing and best oxidizing agent. 

Answer:

Fluorine is the best oxidizing agent ,Lithium is the best reducing agent.  

Question 5: Why F ions cannot be converted to F2 by chemical means?

Answer:

As Fluorine is an oxidizing agent and it does not lose electrons. So, it is chemically impossible.

Question 6: Assign the oxidation number for P in the NaH2PO4.

Answer:  

Let x be oxidation no. of P.

Oxidation no. of Na=+1

Oxidation no. of H = +1

Oxidation no. of O = -2 

Therefore, 

Na+1H2+1PxO4-2 

1(+1)+2(+1)+1(x)+4(-2)=0

1+2+x-8=0

x=+5

Er. Neeraj K.Anand is a freelance mentor and writer who specializes in Engineering & Science subjects. Neeraj Anand received a B.Tech degree in Electronics and Communication Engineering from N.I.T Warangal & M.Tech Post Graduation from IETE, New Delhi. He has over 30 years of teaching experience and serves as the Head of Department of ANAND CLASSES. He concentrated all his energy and experiences in academics and subsequently grew up as one of the best mentors in the country for students aspiring for success in competitive examinations. In parallel, he started a Technical Publication "ANAND TECHNICAL PUBLISHERS" in 2002 and Educational Newspaper "NATIONAL EDUCATION NEWS" in 2014 at Jalandhar. Now he is a Director of leading publication "ANAND TECHNICAL PUBLISHERS", "ANAND CLASSES" and "NATIONAL EDUCATION NEWS". He has published more than hundred books in the field of Physics, Mathematics, Computers and Information Technology. Besides this he has written many books to help students prepare for IIT-JEE and AIPMT entrance exams. He is an executive member of the IEEE (Institute of Electrical & Electronics Engineers. USA) and honorary member of many Indian scientific societies such as Institution of Electronics & Telecommunication Engineers, Aeronautical Society of India, Bioinformatics Institute of India, Institution of Engineers. He has got award from American Biographical Institute Board of International Research in the year 2005.