A concentrated aqueous solution containing each of the following ions, Cl^-, SO₄^2-, Na⁺, Cu²⁺, is electrolysed using platinum electrodes.

Which row shows the ions that discharge first at the two electrodes?

Inert electrodes are used in the electrolysis of an aqueous solution containing both copper(II) sulfate and magnesium sulfate.

What will be produced at the negative electrode?

Metal M can be obtained from its oxide by heating with carbon and from is aqueous chloride by electrolysis.

Which metal is M?

The diagram shows a cell.

Which statement about the cell is correct?

What is the oxidation state of oxygen in ethanol, C₂H₅OH?

Acidified KMnO₄ is used to test for _____________.

During the process, it is ____________.

In the presence of reducing agents, acidified KMnO₄ turns from _______________________.

In which reaction does the oxidation state of iron remain unchanged?

Chlorine reacts with aqueous sodium hydroxide in a redox reaction.

2NaOH (aq) + Cl₂ (g) --> NaClO (aq) + NaCl (aq) + H₂O (l)

Which statement about this reaction is not correct?

During the reaction

In which equations is manganese being reduced?

1) 2Mn(OH)₂ + H₂O₂ --> Mn₂O₃ + 3H₂O

2) MnO₂ + 4HCl --> MnCl₂ + Cl₂ + 2H₂O

3) MnO₄^- + 8H⁺ + 5Fe²⁺ --> 5Fe³⁺ + Mn²⁺ + 4H₂O

In which reaction is substance X reduced?

Which product is formed at the anode when molten lead(II) bromide is electrolysed?