Question

Fill in the blanks in the following statements:
(a) When carbon dioxide is passed through lime water, it turns milky
due to the formation of _________.
(b) The chemical name of baking soda is _________.
(c) Two methods by which rusting of iron can be prevented are
_________ and _________.
(d) Changes in which only _________ properties of a substance change
are called physical changes.
(e) Changes in which new substances are formed are called _________
changes.​

Answer 1

Answer:

a) carbon dioxide

b) sodium hydrogen carbonate

c) painting, greasing with oil

d) physical

e) chemical

Answer 2

1. calcium carbonate

2. Sodium hydrogen carbonate

Formula: NaHCO₃

3. GALVANISATION , GREASING

4. physical

5. chemical

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