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CBSE Class 7 Physical and Chemical Changes (Hard)
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Question 1 of 10
1. Question
Which of the following is a chemical change?
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Question 2 of 10
2. Question
Which is a method to prevent rust?
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Question 3 of 10
3. Question
How crystal of pure substances are obtained?
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Question 4 of 10
4. Question
What is the formula of rust?
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Question 5 of 10
5. Question
What will happen if carbon dioxide gas is passed through lime water?
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Question 6 of 10
6. Question
“Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts
is responsible for its long stability?”Correct
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Question 7 of 10
7. Question
Galvanisation is a process used to prevent the rusting of which of the following?
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Question 8 of 10
8. Question
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a:
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Question 9 of 10
9. Question
A change in which a substance undergoes changes in its physical properties is called
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Question 10 of 10
10. Question
Brown colour of the apple after cutting is
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