Which of the following is FALSE concerning the electrolysis of molten sodium chloride, NaCl?
solid sodium chloride can also undergo electrolysis
sodium is formed at the cathode
molten sodium chloride can be decomposed by the passage of an d.c. electric current
chlorine is formed at the anode
Electrolysis is brought about by passing a d.c. electrical current through a solution of ions (electrolyte). Which of the following statements is FALSE?
oxidation occurs at the anode
an electrolyte is an electrically conducting solution of ions
oxidation involves electron gain
cations are reduced at an electrode
Which of the following statements is FALSE concerning the electrolysis of molten aluminium oxide, Al2O3 ?
oxygen cannot form at the anode
aluminium is formed at the cathode
solid aluminium oxide cannot undergo electrolysis
molten aluminium oxide can be decomposed by the passage of an d.c. electric current
Given the following half-equation for what may happen on the surface of an electrode in electrolysis. 2H+(aq) + 2e- ==> H2(g) Which statement is TRUE about this electrode equation?
it is a reduction at the cathode
the solution must to be acid for this cathode half-reaction to happen
it is an oxidation at the anode
it involves electron gain at the anode
