Skip to content

Course home

Improving processes and products

Improving processes and products

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748
Question 25

To improve industrial metallurgical processes and transition towards low-carbon manufacturing, chemical engineers select extraction methods based on the thermodynamic stability of metal oxides. This stability correlates with the metal's position in the reactivity series relative to carbon and hydrogen.

The partial reactivity series of some metals, including the non-metals carbon and hydrogen, is shown below:

most reactive↑sodiummagnesiumaluminiumcarbonzincironhydrogencopperleast reactive↓ \begin{array}{rcc} \textbf{most reactive} & \uparrow \\ & \text{sodium} \\ & \text{magnesium} \\ & \text{aluminium} \\ & \textbf{carbon} \\ & \text{zinc} \\ & \text{iron} \\ & \textbf{hydrogen} \\ & \text{copper} \\ \textbf{least reactive} & \downarrow \end{array} most reactiveleast reactive​↑sodiummagnesiumaluminiumcarbonzincironhydrogencopper↓​

Which option correctly matches each metal to the most energy-efficient, thermodynamically viable extraction method that reflects its reactivity?

A
Requires ElectrolysisReduction with CarbonHydrogen / Nativecoppermagnesiumzinc \begin{array}{|c|c|c|} \hline \textbf{Requires Electrolysis} & \textbf{Reduction with Carbon} & \textbf{Hydrogen / Native} \\ \hline \text{copper} & \text{magnesium} & \text{zinc} \\ \hline \end{array} Requires Electrolysiscopper​Reduction with Carbonmagnesium​Hydrogen / Nativezinc​​
B
Requires ElectrolysisReduction with CarbonHydrogen / Nativealuminiumzinccopper \begin{array}{|c|c|c|} \hline \textbf{Requires Electrolysis} & \textbf{Reduction with Carbon} & \textbf{Hydrogen / Native} \\ \hline \text{aluminium} & \text{zinc} & \text{copper} \\ \hline \end{array} Requires Electrolysisaluminium​Reduction with Carbonzinc​Hydrogen / Nativecopper​​
C
Requires ElectrolysisReduction with CarbonHydrogen / Nativesodiumaluminiumiron \begin{array}{|c|c|c|} \hline \textbf{Requires Electrolysis} & \textbf{Reduction with Carbon} & \textbf{Hydrogen / Native} \\ \hline \text{sodium} & \text{aluminium} & \text{iron} \\ \hline \end{array} Requires Electrolysissodium​Reduction with Carbonaluminium​Hydrogen / Nativeiron​​
D
Requires ElectrolysisReduction with CarbonHydrogen / Nativeironcoppersodium \begin{array}{|c|c|c|} \hline \textbf{Requires Electrolysis} & \textbf{Reduction with Carbon} & \textbf{Hydrogen / Native} \\ \hline \text{iron} & \text{copper} & \text{sodium} \\ \hline \end{array} Requires Electrolysisiron​Reduction with Carboncopper​Hydrogen / Nativesodium​​
Markscheme

Improving processes and products Questions

  1. GCSE
  2. /Chemistry
  3. /Improving processes and products

81 exam-style questions on OCR GCSE Chemistry Improving processes and products. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank