EASY
8th ICSE
IMPORTANT
Earn 100

Give one word for the chemical reaction that occurs with the release of heat energy. 

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Important Questions on Physical and Chemical Changes

EASY
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 2 - Physical and Chemical Changes>Exercise>Q D
Give one word for another name for the chemical change. (Chemical reaction / Chemical equation)
MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 2 - Physical and Chemical Changes>Exercise>Q E

Classify the following into physical and chemical change.

Burning of paper, photosynthesis, breaking a glass tumbler, sublimation of camphor, curdling of milk, digestion, cooking of food, conversion of liquid water into water vapours, rotting of eggs, ripening of fruit, decaying of leaf

MEDIUM
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 2 - Physical and Chemical Changes>Exercise>Q F
What is a physical change? Explain it with two examples.
HARD
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 2 - Physical and Chemical Changes>Exercise>Q F
Define sublimation. How is the sublimation of camphor a physical change?
HARD
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 2 - Physical and Chemical Changes>Exercise>Q F
What is a chemical reaction? Give an example of a chemical reaction.
HARD
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 2 - Physical and Chemical Changes>Exercise>Q F
Explain how the total mass of substances remain unchanged during a chemical change.
HARD
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 2 - Physical and Chemical Changes>Exercise>Q F
Write any three characteristics of physical and chemical changes.
HARD
8th ICSE
IMPORTANT
Its All About Science - Chemistry>Chapter 2 - Physical and Chemical Changes>Exercise>Q F
Differentiate between a physical and chemical change.