(a) Carbon cannot be used as reducing agent to obtain Mg from MgO. Why ? (b) How is sodium obtained from molten sodium chloride ? Give equation of the reactions.(c) How is copper obtained from its sulphide ore ? Give equations of the reaction
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(a) Since magnesium is found high up in the reactivity series it has more affinity for oxygen than carbon and cannot be obtained by simply heating with carbon.
(b) The metals are deposited at the cathode whereas chlorine is liberated at the anode.
(c) Copper is obtained from its sulphide ore by the process of roasting i.e heating strongly in the presence of excess air.
2ZnS + 3O2 gives 2ZnO + 2SO2
(b) The metals are deposited at the cathode whereas chlorine is liberated at the anode.
(c) Copper is obtained from its sulphide ore by the process of roasting i.e heating strongly in the presence of excess air.
2ZnS + 3O2 gives 2ZnO + 2SO2
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Answer:(a) Since magnesium is found high up in the reactivity series it has more affinity for oxygen than carbon and cannot be obtained by simply heating with carbon.
(b) The metals are deposited at the cathode whereas chlorine is liberated at the anode.
(c) Copper is obtained from its sulphide ore by the process of roasting i.e heating strongly in the presence of excess air.
2ZnS + 3O2 gives 2ZnO + 2SO2
Explanation:
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