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1. Why Does Milk Turn Sour in Summer?
Process: Fermentation by bacteria.
Science Behind It: When milk is left uncovered in warm temperatures, Lactobacillus bacteria convert lactose (milk sugar) into lactic acid. This lowers the pH, causing proteins to curdle and form sour-tasting dairy.
2. Why Does Iron Rust in Humid Air?
Process: Oxidation of iron.
Science Behind It: Moisture and oxygen react with iron (Fe) to form hydrated iron(III) oxide, commonly known as rust.
3. How Do Grapes Ferment into Wine?
Process: Alcoholic fermentation.
Science Behind It: Yeast enzymes break down glucose in grapes into ethanol (alcohol) and carbon dioxide.
4. What Happens When We Cook Food?
Process: Thermal decomposition and Maillard reaction.
Science Behind It:
- Caramelization: Sugars break down into complex, flavorful compounds.
- Maillard Reaction: Amino acids and sugars react to create browning and rich aromas.
Result: Enhanced taste, texture, and digestibility.
5. How Does Our Body Digest Food?
Process: Enzymatic hydrolysis.
Science Behind It: Digestive enzymes break down:
- Carbohydrates → Glucose
- Proteins → Amino Acids
- Fats → Fatty Acids + Glycerol
6. The Chemistry of Breathing
Process: Cellular respiration.
Science Behind It: Oxygen (O₂) reacts with glucose to produce energy (ATP), water, and carbon dioxide.
Conclusion:
These everyday phenomena are irreversible chemical changes—new substances form, and energy transforms. From rust to respiration, chemistry shapes life as we know it!
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