1.

(i) Explain how goldore isleached by cyanideprocess (ii)Explainthe classification of Inosilicates

Answer»

Solution :(a) (i)
(i) Gold is usually FOUND in nativestate
(ii) The leachingprocess is intendedto concentrate the goldmetal.
` 4Au_(s) + 8 NaCN_(aq)^(-) + 2H_(2)O_(aq) + O_(2(g)) to 4 Na [ Au(CN)_(2)]_(aq)^(-) + 4NaOH_(aq)^(-)`
` 2NA[Au(CN)_(2)]+ ZN to Na_(2) [ Zn(CN)_(4)] + 2Au darr`
(iii) In this reaction, Zn actsas a reducingagent ,
(ii) Inosilicates : Silicateswhich contain'n'number of silicateunits likedby sharingtwo or moreoxygenatomsare called inosilicates
Examples :They are further classifiedas chainsilicates and doublechainsilicates


Discussion

No Comment Found

Related InterviewSolutions