Electrolysis Quiz
During electrolysis __________ may be given off of metals deposited at the electrodes. -
ANS-gases
\The products formed during the electrolysis of sulphuric acid are ________________(1) at
the cathode (negative electrode) and ____________(2) at the anode (positive electrode). -
ANS-1. hydrogen
2. oxygen
\When copper is purified by electrolysis...
a) the positive electrode is impure copper
b) the positive electrode is pure copper
c) the negative electrode is impure copper - ANS-statement a is correct; the anode is impure
copper
\When electroplating a metal spoon with silver:
(a) The spoon should be the positive electrode
(b) The silver should be the positive electrode
(c) The silver should be the negative electrode - ANS-statement b is correct
\Where does oxygen form during the manufacture of aluminium?
(a) At the positive electrode
(b) At the negative electrode
(c) At both electrodes - ANS-statement a is correct
\Which statement about the electrolysis of sodium chloride solution is correct?
1. hydrogen forms at the positive electrode
2. sodium forms at the positive electrode
3. chlorine forms at the positive electrode - ANS-statement 3 is correct
\Which statement is correct about what happens during electrolysis?
1. Ions lose electrons at the negative electrode and are oxidised
2. Ions gain electrons at the negative electrode and are oxidised
3. Ions lose electrons at the positive electrode and are oxidised - ANS-statement 3 is correct
\Which statement is correct?
During electrolysis __________ may be given off of metals deposited at the electrodes. -
ANS-gases
\The products formed during the electrolysis of sulphuric acid are ________________(1) at
the cathode (negative electrode) and ____________(2) at the anode (positive electrode). -
ANS-1. hydrogen
2. oxygen
\When copper is purified by electrolysis...
a) the positive electrode is impure copper
b) the positive electrode is pure copper
c) the negative electrode is impure copper - ANS-statement a is correct; the anode is impure
copper
\When electroplating a metal spoon with silver:
(a) The spoon should be the positive electrode
(b) The silver should be the positive electrode
(c) The silver should be the negative electrode - ANS-statement b is correct
\Where does oxygen form during the manufacture of aluminium?
(a) At the positive electrode
(b) At the negative electrode
(c) At both electrodes - ANS-statement a is correct
\Which statement about the electrolysis of sodium chloride solution is correct?
1. hydrogen forms at the positive electrode
2. sodium forms at the positive electrode
3. chlorine forms at the positive electrode - ANS-statement 3 is correct
\Which statement is correct about what happens during electrolysis?
1. Ions lose electrons at the negative electrode and are oxidised
2. Ions gain electrons at the negative electrode and are oxidised
3. Ions lose electrons at the positive electrode and are oxidised - ANS-statement 3 is correct
\Which statement is correct?
