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3. 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.
(a) When carbon dioxide is passed through limewater, it turns milky due to the formation of __calcium carbonate (CaCO3)_ .
(b) The chemical name of baking soda is __sodium hydrogen carbonate__.
(c) Two methods by which rusting of iron can be prevented are __galvanization__ and __ painting__.
(d) Changes in which only __physical__ properties of a substance change are called physical changes.
(e) Changes in which new substances are formed are called __chemical__ changes.
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