MEDIUM
7th ICSE
IMPORTANT
Earn 100

Classify the following change into exothermic and endothermic and physical and chemical changes.

1. Adding water into quick lime

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 1
Which of the following is a periodic change?
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7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q 2
Which of the following is correctly matched? 
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7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q 3
An irreversible change takes place when:
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7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q 4
Which one of the following is a beneficial change?
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7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q 1
Which of the following is not a characteristic of a physical change?
MEDIUM
7th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>Test Your Understanding>Q 2

Which of the following are physical changes?

A. Melting of iron metal  

B. Rusting of iron metal

C. Drawing a wire from iron metal

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?