Question

Name the nitrate which :

Gives two gases and leaves residue.

Answer 1

1. Heavy metal nitrates give a metal residue and two gases.
2. The gases are Nitrogen dioxide($\mathit{N}{\mathit{O}}_{\mathbf{2}}$) and Oxygen(${\mathit{O}}_{\mathbf{2}}$).
3. For example, the heating of Calcium Nitrate($\mathit{C}\mathit{a}{\mathbf{\left(}\mathit{N}{\mathit{O}}_{\mathbf{3}}\mathbf{\right)}}_{\mathbf{3}}$) gives the residue Calcium Oxide($\mathit{C}\mathit{a}\mathit{O}$) and two gases Nitrogen dioxide and Oxygen has.
4. The reaction is, $\underset{Calciumnitrate}{2Ca{\left(N{O}_3\right)}_2\left(s\right)}\stackrel{∆}{\to }\underset{Calciumoxide}{2CaO\left(s\right)}+\underset{Nitrogendioxie}{4N{O}_2\left(g\right)}+\underset{Oxygen}{O_2\left(g\right)}$
5. So, Nitrates are heavy metal nitrates, for example, Calcium nitrate.