MEDIUM
7th ICSE
IMPORTANT
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Digestion of food is a chemical change.

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Important Questions on Physical and Chemical Changes

HARD
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 8
No new substances are formed when salt and sugar (both) are dissolved in a glass of water.
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 9
Germination of seeds is an example of undesirable change.
HARD
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 10
Mixing of powdered sulphur with iron filings is a chemical change.
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 11
Growth of a child into an adult is a fast change.
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 12
Dissolving of salt into water is a physical change.
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 1

Give two examples for the following:

  • Desirable changes
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 2

Give two examples for the following:

  • Slow changes
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 3

Give two examples for the following:

  • Fast changes