Write word equations and then balanced equations for the reaction taking place when: (a) Dilute sulphuric acid reacts with zinc granules. (b) Dilute hydrochloric acid reacts with magnesium ribbon. (c) Dilute sulphuric acid reacts with aluminium powder. (d) Dilute hydrochloric acid reacts with iron filings.

(a) The reaction between dilute sulphuric acid and zinc granules can be represented by the following word equation:
Dilute sulphuric acid + Zinc granules → Zinc sulphate + Hydrogen gas

The balanced equation for the reaction is:
H2SO4 + Zn → ZnSO4 + H2

(b) The reaction between dilute hydrochloric acid and magnesium ribbon can be represented by the following word equation:
Dilute hydrochloric acid + Magnesium ribbon → Magnesium chloride + Hydrogen gas

The balanced equation for the reaction is:
2HCl + Mg → MgCl2 + H2

(c) The reaction between dilute sulphuric acid and aluminium powder can be represented by the following word equation:
Dilute sulphuric acid + Aluminium powder → Aluminium sulphate + Hydrogen gas

The balanced equation for the reaction is:
H2SO4 + 2Al → Al2(SO4)3 + 3H2

(d) The reaction between dilute hydrochloric acid and iron filings can be represented by the following word equation:
Dilute hydrochloric acid + Iron filings → Iron chloride + Hydrogen gas

The balanced equation for the reaction is:
2HCl + Fe → FeCl2 + H2