CBSE Class 7 Science Physical and Chemical Changes Worksheet Set A


            Very Short Answer

Q1)      Define galvanisation?

Q2)      How stainless steel is made?

Q3)      What happens when carbon dioxide passed through lime water?

Q4)      What is rust?

Q5)      Name the two types of changes?


            Short Answer

Q6)      Why explosion of a fireworks is a chemical change?

Q7)      What do you understand by the rusting of iron?

Q8)      Why is protecting the ozone layer important?

Q9)      What do you mean by the term chemical reaction?

Q10)    Why does not stainless steel rust?


            Long Answer

Q11)    Write short note on crystallization?

Q12)    Distinguish between physical and chemical change?

Q13)    Difference between rusting and corrosion?

Q14)    What are the steps taken when the new product may accompany a chemical change?

Q15)    Explain about the chemical reaction and its concepts?

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