503372
Description
Quiz by mia.rigby, updated more than 1 year ago
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Created by eoin.examtime
over 10 years ago
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Copied by mia.rigby
over 10 years ago
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Question 1
Question
Define electrolyte?
Answer
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The current supplier during electrolysis
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A substance that when molten or dissolved in water, allows an electric current to pass through
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The level of electric current in a substance
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The movement of ions during electrolysis
Question 2
Question
Oxidation occurs at the negative electrode
Answer
- True
- False
Question 3
Question
Which of these metals are located at the top of the electrochemical series?
Answer
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Potassium
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Gold
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Mercury
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Calcium
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Sodium
Question 4
Question
Define electrolysis?
Answer
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electrolytes that are very good conductors
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electrolytes that are poor conductors
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the process of placing a coating of metal onto the surface of another
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The use of electricity to bring about a chemical reaction
Question 5
Question
What colour is seen at the negative electrode during the electrolysis of KI?
Answer
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Blue
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Red
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Brown
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Pink
Question 6
Question
What colour is seen at the negative electrode during the electrolysis of KI?
Answer
-
Blue
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Red
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Brown
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Pink
Question 7
Question
Which of the following are examples of electroplating?
Answer
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Chromium-plating steel
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Sulfate coating copper
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Silver-plating nickel
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magnesium plating silver
Question 8
Question
Tendency to lose electrons decreases down the electrochemical series
Answer
- True
- False
Question 9
Question
Electrolysis of KI is used to demonstrate movement of ions
Answer
- True
- False
Question 10
Question
In what proportion does H2 and O2 evolve during electrolysis of acidified water
Answer
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The same amount is produced
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Double the O2 is produced
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Double the H2 is produced
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Triple the O2 is produced
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