potassium cyanide kahan milta hai in hindi for Dummies
Cyanide is principally developed to the mining of silver and gold: It can help dissolve these metals letting separation from the other solids. From the cyanide method, finely floor superior-grade ore is blended with the cyanide (at a ratio of about one:five hundred areas NaCN to ore); small-grade ores are stacked into heaps and sprayed with a cyani