Which of the following is a weak electrolyte?
Sodium chloride
Benzene
Sodium acetate
Ammonium hydroxide
Electrolyte used for electroplating with nickel is
Ammonium thiocyanate
NiSO4
NiCl2
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
Which of the following is not an inert electrode?
Platinum
Mercury
Graphite
None of these
A compound which liberates reddish brown gas around the anode during electrolysis in its molten state is:
Copper (II) oxide
Copper (II) sulphate
Lead (II) bromide
Hoffman's voltameter is used for the electrolysis of:
Water
Sodium oxide
Lead bromide
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
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]
