Correct the following
Slate ment and round
Copper, tin, lead bauxite are fesses
mineral's
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Answer:
Explanation:
(1) During leaching when bauxite is treated with concentrated NaOH, then sodium aluminate and sodium silicate is formed in the soluble form, whereas Fe
2
O
3
is precipitated.
(2) The blistered appearance of copper during the metallurgical process is due to the evolution of SO
2
.
(3) Cast iron is obtained from pig iron.
(4) Hall-Heroult process is used for production of only aluminium.
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