Question

What happens when:-
(a) Zinc reacts with sulphuric acid
(b) Magnesium reacts with hydrochloric acid
(c) Copper is exposed to air
(d) Sodium reacts with water
(e) Iron nails are placed in copper sulphate solution

Answer 1

Explanation:

copper is exposed to air

Answer 2

Answer:

On Rxn Zinc gives ZnSO4 and H2 gas.

On rxn Mg gives MgCl2 and H2 gas .

Copper reacts slowly with oxygen and sulphur gas to give it's oxides and sulphides.

On rxn of Na with NaOH and H2 gas is liberated.

Iron being more reactive displaces(blue coloured) Cu from CuSO4 sol. and turns it into FeSO4 sol.(green coloured).