Question

On heating ammonium dichromate, the gas evolved is?

Answer 1

Heating Ammonium dichromate:

• Ammonium dichromate produces Chromium oxide Nitrogen gas and water on heating as its product.

$\underset{\mathrm{Ammonium}\mathrm{dichromate}}{{\left({\mathrm{NH}}_4\right)}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\left(\mathrm{s}\right)}\to \underset{\mathrm{Chromium}\mathrm{oxide}}{{\mathrm{Cr}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{4{\mathrm{H}}_2\mathrm{O}}\left(\mathrm{g}\right)+\underset{\mathrm{Nitrogen}}{{\mathrm{N}}_2\left(\mathrm{g}\right)}$

Therefore, on heating ammonium dichromate, the gas evolved is nitrogen.