44. (a) (i) Name the ore of zinc containing its sulphide.   45. (ii) In the process of extracting zinc, the above named ore is roasted. Write the equation for the reaction which takes place when the sulphide ore is roasted.   46. (iii) Name the substance used to reduce the roasted ore. Write the equation for the reaction.   47. (iv) 'Iron is removed from a blast furnace as a liquid'. State how zinc leaves a furnace.   48. (b) Write the equations for the reaction of zinc with each of the following: (i) Sodium hydroxide solution.   49. (ii) Dilute sulphuric acid.   50. (iii) Copper sulphate solution.   51. (c) (i) To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.   52. (ii) Name a non-metal that has a metallic lustre and sublimes on heating.