Question

An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that
A. Green solution slowly turns brown
B. Lower end of test tube become slightly warm
C. A colourless gas with the smell of burning sulphur is observed
D. Light green solution changes to blue         ​

Answer 1

Answer:

Explanation: The lower end of the test tube becomes slightly warm because the reaction is exothermic. Aluminium displaces iron from the ferrous sulphate because it is higher in the reactivity series than iron. The green solution turns colourless and a white crystalline salt of aluminium sulphate is observed.