When an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change which is observed is
(1) light green solution slowly turns colourless
(2) the lower end of the test tube becomes slightly warm
(3) a colourless gas with smell of burning sulphur is observed
(4) light green solution changes to blue
Answers
When an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change which is observed is light green solution changes to blue .
Explanation:
2Al (s) + 3FeSO₄ (aq) → Al₂ (SO₄)₃ (aq) + 3Fe (s)
In reactivity series, Aluminium is considered to be more reactive as compared to iron i.e., ferrous or ferric. So, aluminium being the most reactive metal displaces the iron from the ferrous sulphate solution, when the aluminium strip is kept immersed in a freshly prepared light green colour ferrous sulphate solution in the test tube. As a result of which a blue coloured aluminium sulphate is formed along with iron dust.
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Answer:
from my openion it would be option (b)
Explanation:
because it is an exothermic reaction
FeSO⁴+Al----->Al²SO⁴+Fe+heat