Question

Smelting involves reduction of metal oxide with

Answer 1

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Rajdeep here...

Your answer:
Smelting involves reduction of metal oxide with an appropriate flux in its molten state. Most commonly used flux is Calcium Carbonate (CaCO3), which gets converted to Calcium oxide (CaO).

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Answer 2

Answer: carbon

Explanation: Smelting is the process of extraction of metal from its oxide by reduction with carbon. The calcined ore is reduced with carbon, i.e smelted in a blast furnace made of steel and lined with fire bricks. It is narrow at top and bottom which allows proper flow of materials.

For example: Iron is extracted from its ore, $FeO$ by making it react with carbon called as the process of smelting.

$FeO(s)+C(s)\rightarrow Fe+CO(g)$