MEDIUM
7th ICSE
IMPORTANT
Earn 100

Which of the following are physical changes?

A. Melting of iron metal  

B. Rusting of iron metal

C. Drawing a wire from iron metal

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Important Questions on Physical and Chemical Changes

MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q 3
Which of the following is a physical change?
HARD
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Think & Answer>Q (a)
When electricity is passed through water, then two gases, hydrogen and oxygen are produced. On the other hand, when heat is supplied to water, then another gas, steam, is produced. What type of change takes place.
(a) in the first case?
(b) in the second case?
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q a
_____ is formed in a chemical change.
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q b
Chemical changes cannot be _____.
EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q d
Rusting of iron is a _____ change. (physical /chemical)
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 1

Which of the following are chemical changes?

A. Decaying of wood 

B. Burning of wood

C. Sawing of wood

D. Hammering of nail into wood

EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 2
Which one of the following is not a chemical change?
EASY
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES>Q 3
Which of the following is a chemical change?