EASY
7th CBSE
IMPORTANT
Earn 100

What kind of change occurs when sugar is dissolved in water ? Why?

Important Questions on Physical and Chemical Changes

MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Chapter Review>Q 2
Why are burning of wood and ripening of fruits considered as chemical changes ?
EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Chapter Review>Q 3
What is rusting ?
HARD
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Chapter Review>Q 4
Respiration is a kind of chemical change. How?
EASY
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Chapter Review>Q 5
What are the methods to prevent rusting of iron articles?
HARD
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Chapter Review>Q 6
Why does soaking cut vegetables in water prevent their browning?
HARD
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Chapter Review>Q 1
Describe physical change with the help of examples.
MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Chapter Review>Q 2
What are the indications of a chemical reaction taking place?
HARD
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Chapter Review>Q 3
Addition of water to salt or sand is a physical change whereas to cement is a chemical change. Justify the statement.