(a) Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process ?
(b) Name the chemical compound which is electrolysed in molten state to obtain sodium metal. Which gas is produced in this process ?
(c) Name the gas produced when calamine ore is calcined.
(d) Name the gas evolved when cinnabar ore is roasted.
Lakhmir Singh Chemistry Class 10
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Explanation:
(a) The chemical compund electrolysed is aluminium oxide in molten to obtain aluminium metal. During the process oxygen gas is evolved.
(b) The chemical compund electrolysed is sodium chloride in molten state to obtain sodium metal. During the process chlorine gas is evolved.
(c) When calamine ore is calcined, carbon dioxide is produced.
(d) When cinnabar ore is roasted, sulphur dioxide gas is evolved.
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