Question

Q1) Answer the following: 1. When food gets spoiled, it produces a foul smell. Shall we call this change a chemical change? 2. Is neutralisation reaction a chemical change? Explain 3. What do you understand by a Redox reaction? Explain with an example. 4. When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place 5. Define a. Endothermic reaction and b. exothermic reaction 6. Why is it advisable not to shut all the doors and windows during a storm? 7. Explain how lightning takes place 8. Describe / Define the following: a. Tornado: b. Cyclone: c. Storm: 9. I kept an empty bottle made up of plastic inside a refrigerator. After a few hours, when I opened the refrigerator, I found the bottle collapsed. Explain 10. When strong / high speed wind blows, an umbrella held upright at times get upturned. Explain the reason.

Answer 1

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explanation

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Answer 2

Answer:

it is a question OR question paper