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Questions and Answers
Questions and Answers
What occurs when an iron tawa/pan/nail is left exposed to humid atmosphere?
What occurs when an iron tawa/pan/nail is left exposed to humid atmosphere?
- It becomes magnetic
- It rusts due to oxidation (correct)
- It becomes resistant to corrosion
- It becomes lighter in weight
What happens when milk is left at room temperature during summers?
What happens when milk is left at room temperature during summers?
- It becomes more nutritious
- It evaporates completely
- It spoils due to bacterial action (correct)
- It turns into cheese
What happens when grapes get fermented?
What happens when grapes get fermented?
- They turn into raisins
- They shrink in size
- They become sweeter
- They produce alcohol and carbon dioxide (correct)
What occurs when food is cooked?
What occurs when food is cooked?
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What happens when we respire?
What happens when we respire?
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Questions and Answers
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Study Notes
Study Notes
Chemical Reactions
- When an iron tawa/pan/nail is left exposed to humid atmosphere, it undergoes rusting, a type of oxidation reaction where iron reacts with oxygen in the air to form iron oxide.
Food and Temperature
- When milk is left at room temperature during summers, it undergoes bacterial fermentation, leading to curdling and spoilage due to the growth of microbes.
Fermentation
- When grapes get fermented, yeast consumes the sugars present in the grapes, producing ethanol and carbon dioxide as byproducts, resulting in the production of wine.
Cooking and Chemical Reactions
- When food is cooked, various chemical reactions occur, such as Maillard reaction, caramelization, and denaturation of proteins, which alter the texture, flavor, and nutritional content of the food.
Respiration
- When we respire, cellular respiration occurs, where glucose is broken down to produce energy in the form of ATP, releasing carbon dioxide and water as byproducts.
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