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Which of the following reactions will form a precipitate?
                      (a) barium chloride and sodium chloride
                      (b) copper sulphate and iron
                      (c) barium chloride and sodium sulphate
                      (d) sodium sulphate and sodium chloride.

                    On burning magnesium ribbon in air,
             3.
                    (a) black ash is obtained

                    (b) A pungent smelling gas evolves

                    (c) Dazzling white light is produced

                    (d) An ash is formed which turns blue litmus red

             4.    Pour students were asked to observe the effect of heat on CuSO4 crystals. The teachers provived them
                   with test tube holders, test tubes and solid copper sulphate crystals. The students then started heating
                   lead nitrate as shown below. The teacher stopped three of them for using a wrong procedure. The
                   correct way of heating is shown in set up.

                   (a) I   (b) II   (c) III  (d) IV












             5.    Rahul placed an iron strip in copper sulphate solution and after some time observed that


                   (a) A grey and hard coating is deposited on iron strip

                   (b) A soft and black coating is deposited on iron strip

                   (c) A reddish brown  coating is deposited on iron strip

                   (d) A smooth and shiny coating is deposited on iron strip


             6.    Drop some zinc granules in a test tube containing dil H2SO4 solution.You would observe that
                   (a)   Zinc granules crumble to powder

                   (b)   Zinc granules becomes white in colour

                   (c)   Size of zinc granules decreases

                   (d)   Zinc metal becomes bright




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