(a) When carbon dioxide is passed through lime water, it turns milky due to the formation of Calcium carbonate.
(b) The chemical name of baking soda is Sodium hydrogen carbonate.
(c) Two methods by which rusting of iron can be prevented are painting and galvanization .
(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.