Which process is NOT an application of electrolysis?
Separation of metals from their ores.
Protection from corrosion by surface coating.
Disposal of waste materials.
Production of heat and light.
Which of the following is not an inert electrode?
Platinum
Mercury
Graphite
None of these
Cations are formed by
loss of electrons
gain of electrons
Both of the above
None of the above
Which of the following pairs of metals are extracted only by electrolysis?
Na, Pb
Ca, Cu
Ag, K
Na, Ca
A particular solution contains molecules and ions of the solute so it is a
weak acid
strong acid
strong base
salt solution
During the electrolysis of molten lead bromide, which of the following takes place?
Bromine is released at the cathode.
Lead is deposited at the anode.
Bromine ions gain electrons.
Lead is deposited at the cathode.
If a solution of toxic metal ions is subjected to electrolytes, the metal ions will undergo _____ for removal.
Fusion
Oxidation
Reduction
Melting
Electrolyte used for electroplating with nickel is
Ammonium thiocyanate
NiSO4
Sodium chloride
NiCl2
The anode used in the extraction of aluminium is
Graphite rod
Brass
Pure Alumina
platinum
Electrolyte used for electroplating with silver is
AgCl
Na[Ag (NO3)2]
AgNO3
Na[Ag(CN)2]
