10th Class Science Metals and Non-metals Question Bank 10th CBSE Science Metals and Non-metals

  • question_answer   Two ores A and B were taken. On heating, ore A gives  whereas ore B gives . What steps will you take to convert them into metals?

    Answer:

                      (i) Ore A is a carbonate ore. The steps involved in its extraction are                          (1/2) (a) Calcination The carbonate ore is heated strongly in the limited supply of air to produce metal oxide.   (1/2) (b) Reduction to metal The oxide ore is reduced with C (coke). (1/2)  (ii) Ore B is a sulphide ore. Following steps are involved in its extraction                                                                         (1/2)  Roasting The sulphide ore is heated strongly in the presence of excess of air to produce metal oxide.                       (1/2) Reduction Oxides of metal B can be reduced by carbon to obtain the corresponding metals.


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