The ores of metals in the middle of activity series generally present in the form of……………..
The ores of metals in the middle of activity series generally present in the form of……………..
i) Oxides
ii) Chlorides
iii) Sulphates
iv) Sulphides
A) (i) and (ii)
B) (i) and (iii)
C) (ii) and (iii)
D) (i) and (iv)
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