Cations are formed by
loss of electrons
gain of electrons
Both of the above
None of the above
The anode used in the extraction of aluminium is
Graphite rod
Brass
Pure Alumina
platinum
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.
Electrolyte used for electroplating with silver is
AgCl
Na[Ag (NO3)2]
AgNO3
Na[Ag(CN)2]
A compound which liberates reddish brown gas around the anode during electrolysis in its molten state is:
Sodium chloride
Copper (II) oxide
Copper (II) sulphate
Lead (II) bromide
Which of the following pairs of metals are extracted only by electrolysis?
Na, Pb
Ca, Cu
Ag, K
Na, Ca
During electro refining impurities get collected near
anode
cathode
electrolyte
Vaporised
Can We expect that pure water normally conduct electricity?
will not
will
Sometimes
Rare
Which of the following is not an inert electrode?
Platinum
Mercury
Graphite
None of these
Which of the following combination is true for carrying out electroplating of an object?
Direct and large current
Alternative and small current
Alternative and large current
Direct and small current
