Question

मैच द फॉलोइंग ड्राइंग ऑफ द अर्थ​

Answer 1

what is leaching??

listing is the process in which the ore is concentrated by chemical reaction with a suitable reagent which dissolve the aur but not the impurities.

examples are bauxite is leached with a hot concentrated solution of NaOH which dissolves aluminium while other oxides remain on dissolved.