In the previous post, we have discussed on 1 MCQ question on Electrolysis that requires basic Mole Calculations strategy to solve.
Do note that Electrolysis topic is only applicable to students taking:
- GCE ”O” Level Pure Chemistry
- Integrated Programme (IP) – it will be classified under Electrochemistry chapter
- IB programme
- IGCSE and other equivalents
It is NOT applicable to GCE ”O” Level students taking Combine Science syllabus.
Today, we shall continue to look into another challenging Electrolysis question.
Question:
Which of the following requires the largest number of electrons for discharge?
A. 4 mol of Al3+ (aluminium) ions
B. 5 mole of OH– (hydroxides) ions
C. 4 mol of O2- (oxides) ions
D. 10 mol of Na+ (sodium) ions
Try it out! Once you have an answer, proceed to click the link below to see if you have gotten the correct answer. Suggested answer and thought process is given also.
[Read more…] about O Level Chemistry: Challenging Mole Calculation / Electrolysis Questions