Question

B. Fill in the blanks

1. Chemical change involves evolution or absorption of _________

2. Rusting of iron is _______
in nature.

3. Interconversion of states of a matter is a __________
change.

4. Matter is added or removed during a ____________
change.

5. Dissolution of sugar in water is considered as ________
and ________change.

6. When the total mass of a substance is altered, the change is known as _____________ change.

7. Expansion and contraction of a metal on heating and cooling is an example of ___________
change.
​

Answer 1

Answer:

1. Exothermic reaction

Explanation:

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