question_answer 22)

  Which of the following salts does not contain water of crystallization?                 (a) Blue vitriol                    (b) Baking soda                 (c) Washing soda              (d) Gypsum                

Answer:

  (b) Chemical formula of baking soda is NaHC03 (sodium hydrogen carbonate). Chemical formulae of blue vitriol is, washing soda isand gypsum is So, baking powder does not contain water of crystallization.