Question 1(c)
[Maximum number: 1]
Give the name of the process that is used:
to produce bromine from molten lead(II) bromide
IGCSE Chemistry Extended 4.1.3—Products and observations during Topic Practice
4.1.3—Products and observations during
• Identify products and observations during electrolysis of: (a) molten lead(II) bromide (b) concentrated aqueous sodium chloride (c) dilute sulfuric acid with inert platinum/carbon electrodes
Question 1(b)
[Maximum number: 1]
Name the process used to:
produce lead from molten lead(II) bromide
Question 3(d)(iii)
[Maximum number: 1]
Potassium reacts with chlorine to form potassium chloride, KCl.
Concentrated aqueous potassium chloride undergoes electrolysis.
Name the potassium compound that remains in the solution after electrolysis.
Question 10
[Maximum number: 1]
An electrolysis experiment is done using carbon electrodes.
Hydrogen and oxygen are formed at the electrodes.
What is the electrolyte?
A
aqueous copper(II) sulfate
B
concentrated hydrochloric acid
C
dilute aqueous sodium chloride
D
molten potassium oxide
Question 10
[Maximum number: 1]
In separate experiments, electricity was passed through concentrated aqueous sodium chloride and molten lead(II) bromide.
What would happen in both experiments?
A
A halogen would be formed at the anode.
B
A metal would be formed at the cathode.
C
Hydrogen would be formed at the anode.
D
Hydrogen would be formed at the cathode.
Question 10
[Maximum number: 1]
Which substance is not produced during the electrolysis of concentrated aqueous sodium chloride?
A
chlorine
B
hydrogen
C
sodium
D
sodium hydroxide
Question 10
[Maximum number: 1]
Which substance is not produced during the electrolysis of concentrated aqueous sodium chloride?
A
chlorine
B
hydrogen
C
sodium
D
sodium hydroxide
Question 10
[Maximum number: 1]
Electrolytes can be broken down by electrolysis.
Which rows are correct for each electrolyte?
A
1 and 2
B
1 and 4
C
2 and 3
D
3 and 4
Question 10
[Maximum number: 1]
Effervescence is observed at the negative electrode (cathode) during the electrolysis of concentrated aqueous sodium chloride.
Which element is produced at the negative electrode (cathode)?
A
chlorine
B
hydrogen
C
oxygen
D
sodium
Question 10
In separate experiments, electricity was passed through concentrated aqueous sodium chloride and molten lead(II) bromide.
What would happen in both experiments?
A A halogen would be formed at the anode.
B A metal would be formed at the cathode.
C Hydrogen would be formed at the anode.
D Hydrogen would be formed at the cathode.