Kerala Board Solutions for Chapter: Non-Metals, Exercise 2: Exercise 2

Find out to which gases are the following statements related?

The element inevitable for the growth of plants.

Find out to which gases are the following statements related?

The gas formed by the thermal decomposition of ${\mathrm{KMnO}}_4$.

What are the chemicals used to prepare chlorine in the laboratory?

Why is chlorine gas passed through sulphuric acid during the time of preparation?

How is bleaching powder prepared?

Which is the gas coming out from bleaching powder in the presence of water?

“We should avoid chemical fertilizers completely and promote organic fertilizers”. What is your opinion to this argument? Substantiate your answer.

Classify the given chemical reactions in the table below.

a) $\mathrm{Mg}+{\mathrm{O}}_2\to 2\mathrm{MgO}$
b) ${\mathrm{H}}_{2 }+{\mathrm{l}}_2\to 2\mathrm{HI}$
c) $2{\mathrm{H}}_2\mathrm{O}\to 2{\mathrm{H}}_{2 }+{\mathrm{O}}_2$
d) $\mathrm{NaCl}+{\mathrm{AgNO}}_3\to \mathrm{AgCl}+{\mathrm{NaNO}}_3$
e) ${\mathrm{ZnSO}}_4+{\mathrm{BaCl}}_2\to {\mathrm{BaSO}}_4+{\mathrm{ZnCl}}_2$
f) $\mathrm{Zn}+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{ZnSO}}_4+{\mathrm{H}}_2$
g) ${\mathrm{FeSO}}_4+\mathrm{Zn}\to {\mathrm{ZnSO}}_4+\mathrm{Fe}$
h) ${\mathrm{CaCO}}_3\to \mathrm{CaO}+{\mathrm{CO}}_2$