Zinc, aluminium and iron give different products when reacted with sulphuric acid of different strengths (dilute and concentrated), whereas copper reacts only with concentrated sulpuric acid. Justify.

Zinc, aluminium and iron give different products when reacted with sul

1.	Zinc, aluminium and iron give different products when reacted with sulphuric acid of different strengths (dilute and concentrated), whereas copper reacts only with concentrated sulpuric acid. Justify.
Answer» Solution :(i) Comparisonof REACTIVITY of Zn, Al, Fe and Cu. (ii) Comparison of OXIDATION potentials of zinc, iron, alumininum with hydrogen. (iii) TYPE of reaction that takes place when the above metals react with diluted `H_(2)SO_(4)`. (iv) Change in the proprety of `H_(2)SO_(4)` with the increase in CONCENTRATION. (v) Change in the product due to the change in the concentration. (vi) Comparison fo oxidation potential of copper with hydrogen. (vii) Tpye of reaction that can takes place between copper and concetrated `H_(2)SO_(4)`