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a. Cutting of food and baking of food.
b. Rusting of iron and knitting of wool
c. Making sugar solution and Glowing a bulb.
d. Baking of food and rusting.

Subjective Questions:-

Q. Questions Skill Marks
No.

1. Define a chemical change. R 1

2. Can a chemical change be reversible----Explain. U 1

3. . DIRECTION: Each of these questions contains an U 1
Assertion followed by Reason. Read them
carefully and answer the question on the basis
of following options. You have to select the one that
best describes the two statements.

a) If both Assertion and Reason are correct and
Reason is the correct explanation of Assertion.
b) If both Assertion and Reason are correct, but
Reason is not the correct explanation of
Assertion.
c) If Assertion is correct but Reason is incorrect.
d) If Assertion is incorrect but Reason is correct.
e) If Assertion & Reason both are incorrect.
Assertion(A): Bursting of a balloon is a chemical change.

Reason(R): In chemical change new substance is formed.

4. Write three characteristics of a chemical reaction. U 3

5. When coal burns it possess a change. HOTS 3+1+1

a) Which type of change is it? Give reasons in support
of your answer.
b) What is the reactant here?
c) Name the products

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