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Explain why is roasting of zinc blende c...

Explain why is roasting of zinc blende carried out in controlled supply of air.

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Roasting is carried out -

During the extraction of copper, why is roasting of copper pyrites carried out instead of calcination?

Out of calcination and roasting, which one is carried out in case of the following ores? Brown haematite (ii) Bauxite (iii) Zinc blende (iv) Calamine

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Explain why : K, Rb, and Cs, on being heated in the presence of excess supply of air form superoxides into oxides and peroxides.

Explain why is air sometimes considered as a heterogeneous mixture.

A non-spontaneous reaction can be carried out using the concept of coupling reaction. Explain.

Change in enthalpy remains the same whether a reaction is carried out in one step or in several steps under the similar reaction conditions explain the rearms.

Cinnabar (HgS) and galena (PbS) are converted into their respective metals on roasting but zinc blende (ZnS) does not. Explain with reason.

Explain why air pressure in a car tyre increases during driving.