Question

Metal nitrates decompose on heating to give metal oxide and brown fumes of $\mathrm{Nitrogen}\mathrm{dioxide}\left({\mathrm{NO}}_2\right)\mathrm{and}\mathrm{Carbon}\mathrm{dioxide}\left({\mathrm{CO}}_2\right)$.

• A. True
• B. False

Answer 1

The correct option is A True

• Metal nitrates are a chemical compound that consists of a metal and a nitrate ion.
• A decomposition reaction involve breaking down a single substance into two or more different substances.
• Decomposition reaction always requires an input of energy.
• Metal nitrates decompose on heating to give metal oxide, brown fumes of $\mathrm{Nitrogen}\mathrm{dioxide}\left({\mathrm{NO}}_2\right)\mathrm{and}\mathrm{Carbon}\mathrm{dioxide}\left({\mathrm{CO}}_2\right)$.
• :$\mathrm{Lead}\mathrm{nitrate}\left[\mathrm{Pb}{\left(\mathrm{NO}\right)}_3\right]$ undergoes decomposition reaction to form $\mathrm{Lead}\mathrm{oxide}\left(\mathrm{PbO}\right)$,$\mathrm{Nitrogen}\mathrm{dioxide}\left({\mathrm{NO}}_2\right)\mathrm{and}\mathrm{Carbon}\mathrm{dioxide}\left({\mathrm{CO}}_2\right)$.

$\underset{\mathrm{Lead}\mathrm{nitrate}}{2\mathrm{Pb}{\left(\mathrm{NO}\right)}_3\left(\mathrm{s}\right)}\stackrel{∆}{\to }\underset{\mathrm{Lead}\mathrm{oxide}}{2\mathrm{PbO}\left(\mathrm{s}\right)}+\underset{\mathrm{Nitrogen}\mathrm{dioxide}}{4{\mathrm{NO}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}$

Thus,the given statement is true,i.e., Metal nitrates decompose on heating to give metal oxide, brown fumes of $\mathrm{Nitrogen}\mathrm{dioxide}\left({\mathrm{NO}}_2\right),\mathrm{and}\mathrm{Carbon}\mathrm{dioxide}\left({\mathrm{CO}}_2\right)$.