MEDIUM
7th CBSE
IMPORTANT
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If a new substance is formed, the change is called _____ change.

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Important Questions on Physical and Chemical Changes

MEDIUM
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 6 - Physical and Chemical Changes>Multiple Choice Questions (MCQs)>Q 3
When copper sulphate solution reacts with iron, the new substance formed is _____.
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 6 - Physical and Chemical Changes>Multiple Choice Questions (MCQs)>Q 4
Temporary and reversible changes are generally _____ changes.
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 6 - Physical and Chemical Changes>Multiple Choice Questions (MCQs)>Q 5
Which of the following is not a chemical change?
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 6 - Physical and Chemical Changes>Think !>Q 1
Who will experience the problem of rusting more, the people living in Jaipur (Rajasthan) or Mumbai? Why?
MEDIUM
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 6 - Physical and Chemical Changes>Exercise>Q A
How can you say that cutting of paper is a physical change?
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 6 - Physical and Chemical Changes>Exercise>Q A
What is a chemical change? Give two examples of chemical changes.
MEDIUM
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 6 - Physical and Chemical Changes>Exercise>Q A
Give two methods of preventing the rusting of iron.
EASY
7th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 6 - Physical and Chemical Changes>Exercise>Q B
What are the essential conditions for rusting of iron objects?