Describe the role of NaCN in the extraction of gold from gold ore.

The process used for the extraction of gold is

What is the role of coke in the extraction of iron from its oxides?

Suphur dioxide (SO_2) gas is produced when a certain ore is heated write the method involved in the extraction of metal from this ore.

Explain the role of the following in the extraction of metals from their ores : CO in the extraction of nickel.

Explain the role of enzymes in the extraction of DNA from Rhizopus in its purest form.

Which process is used for the enrichment of suphide ore.explain in brief two steps involved in the extraction of metal from enriched suphide ore

Write the chemical reactions involved in the extraction of gold by cyanide process. Also give the role of zinc in the extraction.

Write chemical equations for the extraction of copper from its sulpide ore.

the protective power of the lyophilic colloids es expressed in terms of gold number, a term introduced by Zsigmondy. Gold number is the number of mili - gram of the protective colloid which prevent the coagulation of 10 mL of red gold sol , when 1 mL of a 10 per cent solution of sodium chloride is added to it . thus smaller the gold number of lyophillic colloid, the greater is the protective power. gold number given an indication of : protective nature of colloids, purity of gold in suspension, the charge on a colloidal solution of gold, gram of gold per litre of solution.