Fill in the blanks in the following statements:

  1. When carbon dioxide is passed through lime water, it turns milky due to the formation of _________.
  2. The chemical name of baking soda is _________.
  3. Two methods by which rusting of iron can be prevented are _________ and _________.
  4. Changes in which only _________ properties of a substance change are called physical changes.
  5. Changes in which new substances are formed are called _________ changes.

 

Answer:

  1. When carbon dioxide is passed through lime water, it turns milky due to the formation of calcium carbonate.
  2. The chemical name of baking soda is sodium bicarbonate/ sodium hydrogen carbonate.
  3. Two methods by which rusting of iron can be prevented are painting and galvanising.
  4. Changes in which only physical properties of a substance change are called physical changes.
  5. Changes in which new substances are formed are called chemical changes.
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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo