Electrolysis (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
9 questions from this quiz
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Practise the questions
9 questions from this quiz
What happens to ions when an ionic compound is heated until it melts?
What happens to ions when an ionic compound is heated until it melts?
They become free to move
What is electrolysis of molten ionic compounds used to extract?
What is electrolysis of molten ionic compounds used to extract?
Pure elements such as metals
Why can't ionic compounds conduct electricity in the solid state?
Why can't ionic compounds conduct electricity in the solid state?
Ions are fixed in place
What temperature condition is needed to electrolyse ionic compounds?
What temperature condition is needed to electrolyse ionic compounds?
High temperature to melt them
What happens to positive metal ions at the cathode?
What happens to positive metal ions at the cathode?
They are reduced to pure metals
What do negative non-metal ions form at the anode?
What do negative non-metal ions form at the anode?
Gases or non-metallic elements
Which process occurs at the cathode during electrolysis?
Which process occurs at the cathode during electrolysis?
Reduction
Which process occurs at the anode during electrolysis?
Which process occurs at the anode during electrolysis?
Oxidation
Why does the molten state allow electrolysis to occur?
Why does the molten state allow electrolysis to occur?
Ions are mobile and conduct electricity