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Q 1/10
Score 0
Why do compounds like lead bromide not conduct electricity when solid? In the solid state the:
30
molecules cannot move
electrodes cannot move
electrons cannot move
ions cannot move
Q 2/10
Score 0
The diagram on the information sheet shows the electrolysis of molten lead bromide. Which of the following is not a reason why graphite is used as the electrodes in the electrolysis of lead bromide?
30
Graphite has a very high melting point.
Graphite is a good conductor of heat.
Graphite is an unreactive element.
Graphite is a very good conductor of electricity.
10 questions
Q.
Why do compounds like lead bromide not conduct electricity when solid? In the solid state the:
1
30 sec
Q.
The diagram on the information sheet shows the electrolysis of molten lead bromide. Which of the following is not a reason why graphite is used as the electrodes in the electrolysis of lead bromide?
2
30 sec
Q.
The table on the information sheet shows the correct products of the electrolysis of various electrolytes. Which row correctly shows the products of the electrolyte?
3
30 sec
Q.
Which of the following statements explains why metals above hydrogen are not formed at the negative cathode during the electrolysis of their compounds in water?
4
30 sec
Q.
Which of the following substances can be electrolysed?
5
30 sec
Q.
Aluminium is manufactured by the electrolysis of a molten mixture of aluminium oxide and cryolite using carbon as the positive anode. Which of the following statements is correct about the extraction?
6
30 sec
Q.
Compounds like potassium iodide conduct electricity when molten but not when solid. The reason for this is that in the molten state:
7
30 sec
Q.
In the electrolysis of sodium chloride dissolved in water, which of the following substances will be formed at the negative electrode?
8
30 sec
Q.
Which of the following substances can be electrolysed?
9
30 sec
Q.
Which of the following pairs of substances will be produced in the electrolysis of calcium nitrate dissolved in water?
