Explain the following: Lime water turns milky on passing carbon dioxide gas into it. Bubbles are produced when acetic acid is added to a solution of sodium hydrogencarbonate

CBSE Class 7 CBSE Class 7 Science
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Explain the following:

  1. Lime water turns milky on passing carbon dioxide gas into it.
  2. Bubbles are produced when acetic acid is added to a solution of sodium hydrogencarbonate.

Answer:

  1. This is because of the formation of white coloured insoluble calcium carbonate which is milky.
  2. Carbon dioxide is evolved due to the chemical reaction between acetic acid and sodium hydrogencarbonate.