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REACTIVITY SERIES
K>Na>Ca>Mg>Al>Zn>Fe>Sn>Pb>H>Cu>Ag>Au
⠀(I) metal A is Ag and Au
method :- metal displacement reduction
⠀(ii) metal B is any one of alkali metal and alkaline earth metal
method:- electrolytic reduction
reason:- because these metal are very reactive it is not easy to replace by other elements to displace these metal
note :- Al also obtained from electrolytic reduction but it does not show any reaction with water and air because of formation of things layer of 10^(-4) mm to 10^(-6) mm
⠀(iii) from the reactivity series zn and fe are in the middle
method:- carbon reduction
note:- carbon reduction is most used and cheaf method. carbon completely change the metallurgy.
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