Chemistry 0620 · IGCSE · Physical and chemical changes

Physical and chemical changes — practice question

Certain magnesium compounds break down on heating. What products are formed when magnesium nitrate, $\text{Mg(NO}_3)_2$, and magnesium hydroxide, $\text{Mg(OH)}_2$, undergo thermal decomposition?

  • A$\text{MgO}$, $\text{NO}_2$ and $\text{O}_2$; $\text{MgO}$ and $\text{H}_2\text{O}$
  • B$\text{MgO}$, $\text{NO}_2$ and $\text{O}_2$; $\text{MgO}$ and $\text{H}_2$
  • C$\text{Mg(NO}_2)_2$ and $\text{O}_2$; $\text{MgO}$ and $\text{H}_2\text{O}$
  • D$\text{Mg(NO}_2)_2$ and $\text{O}_2$; $\text{MgO}$ and $\text{H}_2$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI