Chemistry 9701 · AS & A Level · 4.1

4.1 — practice question

When magnesium nitrate is heated, it decomposes. Which equation correctly represents the thermal decomposition of magnesium nitrate?

  • A$\mathrm{Mg(NO_3)_2} \rightarrow \mathrm{MgO} + \mathrm{NO_2} + \mathrm{NO} + \mathrm{O_2}$
  • B$2\mathrm{Mg(NO_3)_2} \rightarrow 2\mathrm{MgO} + 4\mathrm{NO} + 3\mathrm{O_2}$
  • C$2\mathrm{Mg(NO_3)_2} \rightarrow 2\mathrm{MgO} + 4\mathrm{NO_2} + \mathrm{O_2}$
  • D$3\mathrm{Mg(NO_3)_2} \rightarrow \mathrm{Mg_2N_3} + \mathrm{MgO} + 3\mathrm{NO} + 7\mathrm{O_2}$

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