Redox and Electrochemistry O Level

Redox and Electrochemistry O Level

9th - 10th Grade

25 Qs

quiz-placeholder

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Redox and Electrochemistry O Level

Redox and Electrochemistry O Level

Assessment

Quiz

Chemistry

9th - 10th Grade

Hard

Created by

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

Media Image

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

Media Image

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

Media Image

Write the ionic half equation for the reaction that happens at the anode.

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