What is the easy way to remember oxidation and reduction?

Use OIL RIG: Oxidation Is Loss of electrons, Reduction Is Gain of electrons.

Can oxidation happen without reduction?

No. Oxidation and reduction always occur together - electrons lost by one species are gained by another, which is why they are called redox (reduction-oxidation) reactions.

🧪 Chemistry · NEET & JEE

Difference Between Oxidation and Reduction

Oxidation and reduction always happen together in redox reactions. Remember the rule OIL RIG: Oxidation Is Loss, Reduction Is Gain (of electrons).

In short

Oxidation is the loss of electrons (or gain of oxygen / loss of hydrogen); reduction is the gain of electrons (or loss of oxygen / gain of hydrogen).

Oxidation vs Reduction - Comparison Table

Basis	Oxidation	Reduction
Electrons	Lost	Gained
Oxygen	Gained	Lost
Hydrogen	Lost	Gained
Oxidation number	Increases	Decreases
Agent	Reducing agent is oxidised	Oxidising agent is reduced

Want to understand this fully? Read the Chemistry notes or practise questions on this chapter.

Frequently Asked Questions - Oxidation vs Reduction

What is the easy way to remember oxidation and reduction?: Use OIL RIG: Oxidation Is Loss of electrons, Reduction Is Gain of electrons.
Can oxidation happen without reduction?: No. Oxidation and reduction always occur together - electrons lost by one species are gained by another, which is why they are called redox (reduction-oxidation) reactions.

Difference Between Oxidation and Reduction

Oxidation vs Reduction - Comparison Table

Frequently Asked Questions - Oxidation vs Reduction

More Chemistry Comparisons