Why is ferric chloride preferred over potassium chloride in case of cut leading to bleeding?

In electrorefining of copper, where are the Ag and Au found?

Write the names of materials mixed before the calcined ore is subjected for smelting in the extraction of iron. 

Name the two volatile metals.

Which reducing agent for the ore is used in the extraction of iron in the blast furnance ace?

Write the name of the iron obtained from the blast furnance?

Lime stone is used in the manufacture of pig iron from haematite. Why?

Name any two ores of magnesium.

How much pure is Blister Copper?

Why roasting of copper pyrites is done?