EASY
7th CBSE
IMPORTANT
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A chemical reaction between two colourless liquids can give rise to a new colourless substance.

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Important Questions on Physical and Chemical Changes

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>In Class>Q 3
An atom is the smallest part of a compound.
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7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 1
An example of a physical change is
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7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 2
When lemon juice is added to baking powder 
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7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 3
Give the symbol for aluminium.
EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 4
Two hydrogen atoms linked to one oxygen atom in a definite manner form
EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 5
The chemical formula of table salt is 
EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 1

Correct the following statement:

In a physical change, a new substance is formed.

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 2
A chemical reaction always involves formation of one or more substances.