Buying Sodium metabisulfite or hydrazine hydrate

[rizwanullahtahir]

From where can i buy sodium metabisulfite or hydrazine hydrate to participate gold in Pakistan easily?

 

[butcher]

I cannot help you find those chemicals in your area.
Ferrous sulfate (copperas) will work to test for gold in solution, or as a reducing agent to participate gold, and you most likely have everything you need somewhere locally to make it yourself. Pure FeSO4 crystals can be made from Iron and dilute sulfuric acid.