Question

3 . Write chemical equation for the following reactions:
(i)Calcium metal reacts with water.
(ii)Cinnabar is heated in the presence of air.
(iii)Manganese dioxide is heated with aluminium powder.

Answer 1

${\mathcal{\huge\red{A}\blue{n}\green{s}\pink{w}\purple{e}\red{r}{\huge{:-}}}}$

i) H2 + Cl2 → 2HCl

ii) 3BaCl2 + Al2(SO4)3 → 2AlCl3 + 3BaSO4

iii) 2Na + 2H2O → 2NaOH + H2