BharatNotes Oxidation
noun (uncountable)Usage in a UPSC answer
The oxidation of sulphur dioxide to sulphur trioxide in the presence of atmospheric moisture generates dilute sulphuric acid, the primary mechanism behind acid rain that has degraded heritage monuments in Agra and Mathura.
Synonyms
Antonyms
Word Family
oxidise/oxidize (verb), oxidant (noun), oxidative (adjective), oxide (noun), antioxidant (noun), oxidiser (noun)
Root
French oxider = to combine with oxygen; from oxygène (oxygen) + -ation (noun suffix for process)
Etymology
The term entered chemistry via French oxydation, derived from oxygène, which Lavoisier coined in 1779 from Greek oxys (sharp, acid) + gennān (to produce), reflecting his mistaken belief that all acids contain oxygen. The modern electrochemical definition — electron loss — was formalised in the early 20th century as redox theory developed. English adopted oxidation directly from French chemical nomenclature in the late 18th century.
Memory Hook
OIL RIG — Oxidation Is Loss (of electrons), Reduction Is Gain. Remember: when iron oxidises, it loses electrons and gains rust — a visible reminder that oxidation means giving electrons away.
How This Word Works in UPSC Writing
In modern usage, the loss of electrons by a substance, which historically meant combination with oxygen. It always occurs together with reduction, since electrons lost by one species are gained by another, which is why the pair is treated as a single redox process. The applications span corrosion, combustion, respiration and battery chemistry, and naming that breadth shows why the concept is foundational rather than narrow.
Don’t Confuse It With
Oxidation is loss of electrons; reduction is gain, and the two always accompany one another. An oxidising agent accepts electrons and is itself reduced, which is the reversal students most often get wrong. Combustion and corrosion are particular oxidation processes rather than synonyms for it.
Hindi Meaning
ऑक्सीकरण (oxīkaran); अपचयन (apachayan) is reduction.
Common Questions
- What is oxidation?
- The loss of electrons by a substance, originally defined as combination with oxygen.
- Why do oxidation and reduction always occur together?
- Because electrons lost by one substance must be gained by another, so the two half-processes are inseparable and are treated as a single redox reaction.
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