(1) Copper sulphate
121)
(a) Metal
(2) Iron sulphate
(b) Brown colour
(3) Calcium carbonate
(c) Green colour
(4) Magnesium
(d) Insoluble in water
(e) Blue colour
- .
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1) 120
2)12
3)12
4)20
5)0
6)20
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