A-LevelChemistryElectrochemistryOct/Nov 2022Paper 1 Q61 Mark
The compound potassium bismuthate(V), KBiO3, is a powerful oxidising agent. What is the significance of the (V) in potassium bismuthate(V)?
AIt is the oxidation number of the bismuth atom.
BIt is the charge of the bismuthate ion.
CIt is the oxidation number of the bismuthate ion.
DIt is the sum of the charges of the two ions present.
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of electrochemistry within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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