
Redox and Electrochemistry O Level
Quiz
•
Chemistry
•
9th - 10th Grade
•
Hard
Hui sze Quah
Used 29+ times
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which reaction is an example of a redox reaction?
2SO2 + O2 --> 2SO3
Ag+ + Cl- --> AgCl
CuO + H2SO4 --> CuSO4 + H2O
H+ + OH- --> H2O
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The reaction in which the same element is both oxidised and reduced is called a disproportionation reaction. Which equation is an example of a disproportionation reaction?
3Cu +8HNO3 --> 3Cu(NO3)2 + 2NO + 4H2O
Cl2 + 2NaOH --> NaCl + NaOCl + H2O
Fe2(SO4)3 + 2KI --> 2FeSO4 + K2SO4 + I2
2Pb(NO3)2 --> 2PbO + 4NO2 + O2
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The formation of metallic oxides involves the transfer of electrons from metal atoms to oxygen atoms. In the formation of one mole of which metallic oxide do the metal atoms not transfer exactly 2 moles of electrons?
aluminium oxide
iron(II) oxide
magnesium oxide
sodium oxide
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Aluminium is obtained by electrolysis of molten aluminium oxide. Which statement about this electrolysis is correct?
Aluminium ions are oxidised to aluminium at the negative electrode.
Aluminium ions are oxidised to aluminium at the positive electrode.
Aluminium ions are reduced to aluminium at the negative electrode.
Aluminium ions are reduced to aluminium at the positive electrode.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
4 different solutions were electrolysed in separated experiments. In one of the experiments, element X2 was formed at the positive electrode. For which combination of solution and electrodes can the reaction for the formation of X2 be represented by the equation shown below? 2X- --> X2 + 2e-
aqueous copper(II) sulfate with copper electrodes
aqueous copper(II) sulfate with inert electrodes
concentrated aqueous sodium chloride with inert electrodes
dilute aqueous sodium chloride with inert electrodes
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Dilute aqueous sodium chloride and concentrated aqueous sodium chloride are electrolysed using inert electrodes in separate experiments. Which row shows the products of these experiments?
A
B
C
D
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Write the ionic half equation for the reaction that happens at the anode.
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