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Questions and Answers
What is the purpose of the activity described in the text?
What is the purpose of the activity described in the text?
- To study the digestion process in the human body
- To understand the process of fermentation in grapes
- To observe the effect of temperature on milk
- To determine the nature and identity of initial substances in chemical reactions (correct)
In which situation does a chemical change occur?
In which situation does a chemical change occur?
- Exposing an iron tawa/pan/nail to a humid atmosphere
- Leaving milk at room temperature during summers
- Respiration
- Cooking food (correct)
What happens when a magnesium ribbon is burnt as described in the text?
What happens when a magnesium ribbon is burnt as described in the text?
- It forms ash (correct)
- It remains unchanged
- It evaporates into thin air
- It becomes a liquid
What do we observe during the burning of a magnesium ribbon?
What do we observe during the burning of a magnesium ribbon?
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Why is it recommended to wear eye protection during the activity?
Why is it recommended to wear eye protection during the activity?
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