Zinc wire discharge the +green colour of ferrous sulphate and an iron wire discharge the blue copper sulphate
Answers
The ZINC (Zn) wire discharge the green color of Ferrous Sulphate ( FeSO4), this is because zinc lies above Iron (Fe) in the reactivity series of metals. And the metal which lies above in the reactivity series displaces the metal lying below it from its salt solution. Zinc lying above Iron therefore displaces iron from ferrous sulphate to discharge green colour.
Similarly, Iron wire (Fe) discharges blue colour from Copper Sulphate ( CuSO4) because Iron lies above Copper in the reactivity series and therefore displaces copper from Copper Sulphate to give blue colour.
The reactivity series of metals is a series in which the metals are arranged in the decreasing order of their reactivity.
Reactivity Series of Metals ( in the order of decreasing reactivity)
Symbol - Name of Metal
K - Potassium
Na - Sodium
Ba - Barium
Ca- Calcium
Mg - Magnesium
Al - Aluminium
Zn - Zinc
Fe - Iron
Ni - Nickel
Sn - Tin
Pb - Lead
[H} - Hydrogen
Hg - Mercury
Cu - Copper
Ag - Silver
Au - Gold
Pt - Platinum
the metals lying below Hydrogen do not displace Hydrogen from acids