Question

Name a substance which, on heating, leaves no residue behind. Give the equation.

Answer 1

• When Ammonium nitrate is heated, Nitrous oxide (${\mathrm{N}}_2\mathrm{O}$) and water are formed.
• Ammonium nitrate (${\mathrm{NH}}_4{\mathrm{NO}}_3$) is a substance that leaves no residue when heated.
• The reaction involved is-

$\underset{\mathrm{Ammonium}\mathrm{nitrate}}{{\mathrm{NH}}_4{\mathrm{NO}}_3\left(\mathrm{s}\right)}\stackrel{\mathrm{Heat}}{\to }\underset{\mathrm{Nitrous}\mathrm{oxide}}{{\mathrm{N}}_2\mathrm{O}\left(\mathrm{g}\right)\uparrow }+\underset{\mathrm{water}}{2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$

Hence, Ammonium nitrate is a substance that on heating leaves no residue behind.