Question

Write chemical equations for the following:

a) A vigorous reaction of a metal with water

b) Reaction of a non-metal with oxygen ​

Answer 1

Cinnabar is heated in the presence of air:

(Cinnabar)

HgS

+

(Air)

3O

2

−2SO

2

2HgO⟶2Hg+O

2

When cinnabar (an ore of mercury) is heated in air, it is first converted into mercuric oxide (HgO), which is then reduced to mercury on further heating.

Answer 2

Answer:

.Ca(OH)2 + HNO3 → Ca(NO3)2 + H2O.

2 CH3COOH + Ca(OH)2 → Ca(CH3COO)2 + 2 H2O.

. HCl + NaOH → NaCl + H2O.

. 2NH4OH + H2SO4 → (NH4)2SO4 + 2H2O.