question_answer

  Solid calcium oxide was taken in a container and water was added slowly to it. (i) State the two observations made in the experiment. (ii) Write the name and chemical formula of the product formed.           [CBSE (AI) 2008/C]

Answer:

                  (i) Following are the two observations: (a)    Calcium oxide (CaO) reacts vigorously with water to form slaked lime.  (b) The container becomes hot because a large amount of heat is released during this reaction. (ii) The product formed is slaked lime for which the chemical formula is Ca(OH)2.