1.
During electrolysis, anions undergo
A
reduction, anode
B
reduction, cathode
C
oxidation, anode
D
oxidation, cathode
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21 practice sets · Page 1 of 2
During electrolysis, anions undergo
reduction, anode
reduction, cathode
oxidation, anode
oxidation, cathode
Which primary cell has the longest life?
Mercury cell
Lithium cell
Carbon zinc cell
Alkaline cell
Which pair of electrolytes is not inert?
Mercury and Carbon
Mercury and sodium
Silver and Carbon
Copper and Silver
Which of the following methods CANNOT reduce the pollution from the electroplating industry?
Recover the metal ions for direct reuse
Precipitate out the heavy metal ions in the effluents
Neutralize the alkaline effluents with excess sulphuric acid
Neutralize the acidic effluents with slaked lime
Which of the following is a non-electrolyte
Acetic acid
Sugar
Calcium
Potassium
Which metal is used in electroplating cans to store food?
Ni
Sn
Cr
Ag
Which of the following statements about the electrolysis of concentrated potassium iodide solution using graphite electrodes is correct?
A brown colour appears around the cathode
The mass of the graphite electrodes increases
The amount of potassium ions decreases
The pH value of the resultant solution increases
Water is decomposed into hydrogen and oxygen by means of an electric current by the method of
electrolysis
electric heating
electroplating
None of these
Water is a
strong electrolyte
weak electrolyte
non-electrolyte
None of these
The weak electrolyte among the following is
Sodium chloride solution
Dilute hydrochloric acid
Dilute sulphuric acid
Aqueous acetic acid
The results of electrolysis of a blue solution using graphite electrodes. Cathode Electrode: Cathode Some reddish brown solids form. The solid does not react Anode Electrode: A gas with a choking smell evolves. The gas can turn moist blue litmus paper red and then white. The solution is probably with dilute hydrochloric aci
concentrated copper(II) chloride solution
concentrated copper(II) sulphate solution
concentrated sodium iodide solution
concentrated sodium chloride solution
The negative electrode in electrolysis is called the
anode
cathode
gas electrode
None of these
The material which is to be electroplated
can be connected to either cathode or anode
is freely kept in the electrolytic tank
is connected to the terminal of the cathode
is connected to the terminal of the anode
The electrode where the current enters the electrolyte is called the
electric current
conductor
anode
cathode
The current flow through electrolyte is due to the movement of
Holes
Electrons
Ions
None of these
Sodium chloride is a
strong electrolyte
weak electrolyte
non-electrolyte
None of these
For electrolysis to work, used compound should be a
insulator
conductor
metalloid
non conductor
During electrolysis, the electrolyte conducts electricity by the movement of
delocalized electrons
mobile cations and anions
electrolyte particles
solvent particles
During electrolysis of NaCI, the gas discharged at the anode is
Chlorine
Hydrogen
Oxygen
None of these
An electrolyte is a
metal
sugar
cell
liquid that conducts electricity