Page 2 - 4. HOME ASSIGNMENT-(CH-2-WASHING SODA & PLASTER OF PARIS)
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Reason : When Plaster of Paris is mixed with water and applied around the
                       fractured limbs, it sets into a hard mass.
                 Q.5   Assertion : Baking powder is used in baking cakes along with baking soda.
                       Reason :      Baking soda makes the cake bitter due to formation of sodium
                       carbonate.



               SUBJECTIVE

              S.L                                    Questions                                     Ma Skill
              No.                                                                                  rk
              Q.1    Name  a  salt  which  does  not  contain  water  of crystallisation.          1    R
                     [CBSE 2010]
              Q.2    Write the name and chemical formula of the product                            1    u
                     formed by heating gypsum at 373 K.         [CBSE 2010]
              Q.3    What is meant by the term water of crystallisation? How would you             3    R+A
                     show that copper sulphate crystals contains water of crystallisation?
                                                                                                           [CBSE 2016]

              Q.4    Give two uses of baking soda and washing soda each.[CBSE 2013]                3    U+A


              Q.5                                                                                  5    HOT
                     Write balanced chemical equations for the following:
                     a.   Bleaching powder is kept open in air.

                     b.   Blue crystals of copper sulphate are heated.
                     c.   Chlorine gas is passed through dry slaked lime.

                     d.   Carbon dioxide gas is passed through lime water.
                     e.   NaOH solution is heated with zinc granules.[CBSE 2014]

































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