Question

we cannot use carbon for extraction of low reactive metal in this case what is the alternative can be used​

Answer 1

Explanation:

The extraction method used depends upon the metal's position in the reactivity series. In principle, any metal could be extracted from its compounds using electrolysis. However, large amounts of electrical energy are needed to do this, so electrolysis is expensive.

If a metal is less reactive than carbon, it can be extracted from its compounds by heating with carbon. Copper is an example of this. Copper mostly occurs as sulfide ores, which are heated in air to convert them to copper(II) oxide. Molten copper can be produced from copper oxide by heating with carbon:

Copper oxide + carbon → copper + carbon dioxide

2CuO(s) + C(s) → 2Cu(l) + CO2(g)

Copper oxide is reduced as carbon is oxidised, so this is an example of a redox reaction.

Answer 2

Answer:

in place of calcination we can use roasting(sulphide ore) and oxygen so that we would get an oxide of metal and sulphur dioxide gas.Then the oxide will be reduced to constituent metal