Chemical Reactions and Daily Life

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What is the purpose of the activity described in the text?

To observe the reaction of magnesium with air

What happens when milk is left at room temperature during summers?

It undergoes a chemical change

What happens when an iron tawa/pan/nail is left exposed to humid atmosphere?

It gets rusted due to a chemical change

What can be inferred when grapes get fermented?

A chemical reaction has occurred

What type of change occurs when food gets digested in our body?

Chemical change

Study Notes

Chemical Changes

  • The purpose of the activity described in the text is to observe and understand chemical changes that occur in everyday life.

Milk Left at Room Temperature

  • When milk is left at room temperature during summers, it undergoes a chemical change, resulting in the growth of bacteria and hence spoilage.

Iron Exposure to Humid Atmosphere

  • When an iron tawa/pan/nail is left exposed to a humid atmosphere, it undergoes rusting, which is a chemical change.

Fermentation of Grapes

  • When grapes get fermented, it can be inferred that a chemical change has occurred, resulting in the conversion of grape juice into alcohol and carbon dioxide.

Digestion in the Human Body

  • When food gets digested in our body, a chemical change occurs, where complex molecules of food are broken down into simpler molecules that can be absorbed and utilized by the body.

Explore the connection between chemical reactions and everyday occurrences through a series of thought-provoking scenarios. Consider the changes in substances during milk spoilage, iron exposure to humidity, fermentation of grapes, cooking, digestion, and respiration.

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