MEDIUM
7th CBSE
IMPORTANT
Earn 100

How would you establish rusting of iron is a chemical reaction?

Important Questions on Physical and Chemical Changes

MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 6 - Physical and Chemical Changes>Test Your Learning Outcome>Q 6
How do we protect our iron fixtures from rusting?
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 6 - Physical and Chemical Changes>Test Your Learning Outcome>Q 1
Give example from most common combination reactions taking place in nature?
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 6 - Physical and Chemical Changes>Test Your Learning Outcome>Q 2
What is decomposition reaction? Explain it giving example.
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 6 - Physical and Chemical Changes>Test Your Learning Outcome>Q 3
What kind of chemical reaction takes place when an acid and base in solution are put together?
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 6 - Physical and Chemical Changes>Test Your Learning Outcome>Q 4
What do you understand by neutralization reaction?
MEDIUM
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 6 - Physical and Chemical Changes>Test Your Learning Outcome>Q 5
Why do iron nails get coated with copper when placed in the solution of copper sulphate in water?
HARD
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 6 - Physical and Chemical Changes>Test Your Learning Outcome>Q 1
Why does the exposed surface of a cut brinjal turns brown?
HARD
7th CBSE
IMPORTANT
S. Chand's SCIENCE For Class VII>Chapter 6 - Physical and Chemical Changes>Test Your Learning Outcome>Q 2
Does the browning of cut fruits reduce their nutritive values?