Science Quiz / 4E1 Chem Blitz 2- EChem

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QUIZ: Can you solve the EChem and Redox Questions?

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When potassium dichromate (VII) acts as an oxidising agent, it is reduced to chromium (III). What colour is chromium (III)?
What is the oxidation state of sulfur in ZnSO4?
Molten lead (II) bromide is electrolysed. What is formed at the cathode?
A simple cell is formed using copper and iron in aqueous sodium chloride. Name a metal which could replace iron to form a more powerful cell.
When dilute aqueous sodium chloride is electrolysed, what is evolved at the anode?
________________ occurs at the anode during electrolysis.
Name a metal that could be extracted via electrolysis.
When a substance is oxidised, it loses _________.
A coin is to be electroplated with platinum. At which electrode should the coin be placed?
When water was electrolysed, 20cm3 of oxygen was evolved. What volume of hydrogen was evolved?

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