A redox reaction is a chemical reaction where oxidation (loss of electrons) and reduction (gain of electrons) happen together. These reactions are very common in everyday life and are essential for many natural and practical processes.
Examples in daily life:
- Respiration in our body – When we breathe, glucose is oxidized to release energy, while oxygen is reduced to form water. This redox process provides energy for all life activities.
- Photosynthesis in plants – Carbon dioxide and water are converted into glucose and oxygen. Here, carbon dioxide is reduced and water is oxidized.
- Rusting of iron – Iron gets oxidized in the presence of water and oxygen, forming rust. This is a slow redox reaction seen commonly in metals.
- Combustion of fuels – Burning of wood, coal, petrol, or LPG is a redox process where carbon is oxidized and oxygen is reduced, producing heat and light.
- Batteries – In devices like mobile phones, cars, or flashlights, batteries work because of redox reactions that generate electricity.
In simple words: Redox reactions are everywhere – in breathing, eating, cooking, using electricity, and even in the rust on metals.