QUIZ ON ELECTROLYSIS (UK GCSE 9-1 Chemistry harder Higher Tier level)

In the electrolysis of moderately concentrated sodium chloride solution (brine) using carbon/platinum electrodes, the principal product formed at the positive anode is? [ef1]
1. chlorine
2. hydrogen
3. oxygen
4. sodium
In the electrolysis of moderately concentrated sodium chloride solution (brine) using carbon/platinum electrodes, the principal product formed at the negative cathode is? [ef2]
1. chlorine
2. hydrogen
3. oxygen
4. sodium
When copper(II) sulfate solution undergoes electrolysis using inert carbon or platinum electrodes the product at the positive anode is? [ef3]
1. sulfur
2. hydrogen
3. oxygen
4. copper
When copper(II) sulfate solution undergoes electrolysis using inert carbon or platinum electrodes the product at the negative cathode is? [ef4]
1. sulfur
2. hydrogen
3. oxygen
4. copper
In the electrolysis of sodium sulfate solution with carbon/platinum electrodes, what product is formed on the surface of the negative cathode? [ef5]
1. hydrogen
2. oxygen
3. sodium
4. sulfur dioxide
In the electrolysis of sodium sulfate solution with carbon/platinum electrodes, what product is formed on the surface of the positive anode? [ef6]
1. hydrogen
2. oxygen
3. sodium
4. sulfur dioxide
In the electrolysis of water acidified with sulfuric acid, using inert carbon or platinum electrodes, what product is formed on the surface of the negative cathode? [ef7]
1. sulfur
2. sulfur dioxide
3. hydrogen
4. oxygen
In the electrolysis of water acidified with sulfuric acid, using inert carbon or platinum electrodes, what product is formed on the surface of the positive anode? [ef8]
1. copper ions
2. sulfur dioxide
3. hydrogen
4. oxygen
When copper(II) sulfate solution undergoes electrolysis using carbon cathode and copper anode electrodes the product at the negative cathode is? [ef9]
1. copper
2. blue copper(II) ions
3. oxygen
4. hydrogen
When copper(II) sulfate solution undergoes electrolysis using a carbon cathode and copper anode electrodes the product at the positive anode is? [ef10]
1. copper
2. blue copper(II) ions
3. oxygen
4. hydrogen
When copper(II) chloride solution undergoes electrolysis using a carbon/platinum electrodes the product at the negative cathode is? [ef11]
1. hydrogen
2. blue copper(II) ions
3. copper
4. chlorine
When copper(II) chloride solution undergoes electrolysis using a carbon/platinum electrodes the product at the positive anode is? [ef12]
1. hydrogen
2. blue copper(II) ions
3. copper
4. chlorine
Which of the following statements is FALSE concerning the electrolysis of molten lead bromide, PbBr₂ ? [ef13]
1. solid lead bromide can also undergo electrolysis
2. lead is formed at the cathode
3. bromine is formed at the anode
4. molten lead bromide can be decomposed by the passage of a d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten lead bromide, PbBr₂ ? [ef14]
1. solid lead bromide cannot undergo electrolysis
2. lead oxide is formed at the cathode
3. bromine is formed at the anode
4. molten lead bromide can be decomposed by the passage of a d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten lead bromide, PbBr₂ ? [ef15]
1. solid lead bromide cannot undergo electrolysis
2. lead is formed at the cathode
3. oxygen is formed at the anode
4. molten lead bromide can be decomposed by the passage of a d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten lead bromide, PbBr₂ ? [ef16]
1. solid lead bromide cannot undergo electrolysis
2. lead is formed at the cathode
3. bromine is formed at the anode
4. molten lead bromide can be decomposed by the passage of an a.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten sodium chloride, NaCl ? [ef17]
1. solid sodium chloride can also undergo electrolysis
2. sodium is formed at the cathode
3. chlorine is formed at the anode
4. molten sodium chloride can be decomposed by the passage of an d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten sodium chloride, NaCl ? [ef18]
1. solid sodium chloride cannot undergo electrolysis
2. sodium is oxidised at the cathode
3. chlorine is formed at the anode
4. molten sodium chloride can be decomposed by the passage of an d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten sodium chloride, NaCl ? [ef19]
1. solid sodium chloride cannot undergo electrolysis
2. sodium is formed at the cathode
3. chlorine is oxidised at the anode
4. molten sodium chloride can be decomposed by the passage of an d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten sodium chloride, NaCl ? [ef20]
1. solid sodium chloride cannot undergo electrolysis
2. sodium is formed at the cathode
3. chlorine is formed at the anode
4. molten sodium chloride can be decomposed by the passage of an a.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten aluminium oxide, Al₂O₃ ? [ef21]
1. solid aluminium oxide can also undergo electrolysis
2. aluminium is formed at the cathode
3. oxygen is formed at the anode
4. molten aluminium oxide can be decomposed by the passage of an d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten aluminium oxide, Al₂O₃ ? [ef22]
1. solid aluminium oxide cannot undergo electrolysis
2. aluminium is oxidised at the cathode
3. oxygen is formed at the anode
4. molten aluminium oxide can be decomposed by the passage of an d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten aluminium oxide, Al₂O₃ ? [ef23]
1. solid aluminium oxide cannot undergo electrolysis
2. aluminium is formed at the cathode
3. oxygen cannot form at the anode
4. molten aluminium oxide can be decomposed by the passage of an d.c. electric current
Which of the following statements is FALSE concerning the electrolysis of molten aluminium oxide, Al₂O₃ ? [ef24]
1. solid aluminium oxide cannot undergo electrolysis
2. aluminium is formed at the cathode
3. oxygen is formed at the anode
4. molten aluminium oxide can be decomposed by the passage of an a.c. electric current
When copper(II) sulfate solution undergoes electrolysis using copper electrodes the product at the positive anode is? [ef25]
1. blue copper(II) ions
2. copper
3. hydrogen
4. oxygen
When copper(II) sulfate solution undergoes electrolysis using copper electrodes the product at the negative cathode is? [ef26]
1. blue copper(II) ions
2. copper
3. hydrogen
4. oxygen
Which of the following statements about electrolysis is FALSE? [ef27]
1. metals or hydrogen are formed at the cathode
2. any ionic compound dissolved in water can undergo electrolysis
3. an electrolyte is a solution or melt that cannot conduct a d.c. electrical current
4. positively charged ions migrate to the negatively charged cathode
Which of the following statements about electrolysis is FALSE? [ef28]
1. metals or hydrogen are formed at the cathode
2. any ionic compound dissolved in water can undergo electrolysis
3. an electrolyte is a solution or melt that contains ions and so conducts electricity
4. positively charged ions migrate to the anode
Which of the following statements about electrolysis is FALSE? [ef29]
1. metals or hydrogen are formed at the anode
2. any ionic compound dissolved in water can undergo electrolysis
3. an electrolyte is a solution or melt that contains ions and so conducts electricity
4. negatively charged ions migrate to the anode
Which of the following statements about electrolysis is FALSE? [ef30]
1. any ionic compound dissolved in water can undergo electrolysis
2. non-metals like oxygen and chlorine are formed at the cathode
3. an electrolyte is a solution or melt that contains ions and so conducts electricity
4. negatively charged ions migrate to the anode
Which of the following statements about electrolysis is FALSE? [ef31]
1. any ionic compound dissolved in water can undergo electrolysis
2. non-metals like oxygen and chlorine are formed at the anode
3. any compound dissolved in water can readily conduct electricity and undergo electrolysis.
4. positively charged ions migrate to the cathode
Which of the following statements about electrolysis is FALSE? [ef32]
1. any ionic compound dissolved in water can undergo electrolysis
2. non-metals like oxygen and chlorine are formed at the anode
3. solid ionic compounds cannot undergo electrolysis.
4. positively charged ions migrate to the anode
What do we call the positive electrode in an electrolysis cell? [ef33]
1. anode
2. cathode
3. electrolyte
4. anion
5. cation
What do we call the negative electrode in an electrolysis cell? [ef34]
1. anode
2. cathode
3. electrolyte
4. anion
5. cation
What do we call a negatively charged ion? [ef35]
1. anode
2. cathode
3. electrolyte
4. anion
5. cation
What do we call a positively charged ion? [ef36]
1. anode
2. cathode
3. electrolyte
4. anion
5. cation
Electrolysis is brought about by passing a d.c. electrical current through a solution of ions (electrolyte). Which of the following statements is FALSE? [eh-1]
1. oxidation involves electron gain
2. an electrolyte is an electrically conducting solution of ions
3. oxidation occurs at the anode
4. cations are reduced at an electrode
Electrolysis is brought about by passing a d.c. electrical current through a solution of ions (electrolyte). Which of the following statements is FALSE? [eh-2]
1. an electrolyte is an electrically conducting solution of ions
2. reduction involves electron loss
3. oxidation occurs at the anode
4. cations are reduced at an electrode
Electrolysis is brought about by passing a d.c. electrical current through a solution of ions (electrolyte). Which of the following statements is FALSE? [eh-3]
1. anions are oxidised at an electrode
2. reduction involves electron gain
3. oxidation occurs at the cathode
4. an electrolyte is an electrically conducting solution of ions
Electrolysis is brought about by passing a d.c. electrical current through a solution of ions (electrolyte). Which of the following statements is FALSE? [eh-4]
1. anions are oxidised at an electrode
2. reduction involves electron gain
3. an electrolyte is an electrically conducting solution of ions
4. cations are reduced at the anode
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? [eh-5]
1. it is a reduction at the cathode
2. it is an oxidation at the anode
3. the solution must to be acid for this cathode half-reaction to happen
4. it involves electron gain at the anode
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? [eh-6]
1. it is an oxidation at the anode
2. the solution does not have to be acid for this cathode half-reaction to happen
3. it is an oxidation at the cathode
4. it involves electron loss at the anode
Given the following half-equation for what may happen on the surface of an electrode in electrolysis.
2Cl^-(aq) ==> Cl₂(g) + 2e^-
Which statement is TRUE about this electrode equation? [eh-7]
1. it is a reduction at the cathode
2. it involves electron loss at the cathode
3. it is an oxidation at the anode
4. it involves electron gain at the anode
Given the following half-equation for what may happen on the surface of an electrode in electrolysis.
2Cl^-(aq) ==> Cl₂(g) + 2e^-
Which statement is TRUE about this electrode equation? [eh-8]
1. it is a reduction at the cathode
2. it involves electron loss at the cathode
3. it is a reduction at the anode
4. it involves electron loss at the anode
Given the following half-equation for what may happen on the surface of an electrode in electrolysis.
Cu²⁺(aq) + 2e^- ==> Cu(s)
Which statement is TRUE about this electrode equation? [eh-9]
1. it is a reduction at the cathode
2. it is an oxidation at the anode
3. it involves electron loss at the cathode
4. it involves electron gain at the anode
Given the following half-equation for what may happen on the surface of an electrode in electrolysis.
Cu²⁺(aq) + 2e^- ==> Cu(s)
Which statement is TRUE about this electrode equation? [eh-10]
1. it is an oxidation at the cathode
2. it involves electron gain at the cathode
3. it involves electron loss at the anode
4. it involves electron gain at the anode
Given the following half-equation for what may happen on the surface of an electrode in electrolysis.
Cu(s) ==> Cu²⁺(aq) + 2e^-
Which statement is TRUE about this electrode equation? [eh-11]
1. it is an oxidation at the cathode
2. it involves electron gain at the cathode
3. it involves electron loss at the anode
4. it involves reduction at the anode
Given the following half-equation for what may happen on the surface of an electrode in electrolysis.
Cu(s) ==> Cu²⁺(aq) + 2e^-
Which statement is TRUE about this electrode equation? [eh-12]
1. it is an oxidation at the cathode
2. it involves electron gain at the cathode
3. it involves electron gain at the anode
4. it involves an oxidation at the anode
Given the following half-equation for what may happen on the surface of an electrode in electrolysis.
4OH^- ==> 2H₂O(l) + O₂(g) + 4e^-
Which statement is TRUE about this electrode equation? [eh-13]
1. it involves electron loss at the anode
2. it involves electron gain at the cathode
3. it involves reduction at the anode
4. it involves an oxidation at the cathode
Given the following half-equation for what may happen on the surface of an electrode in electrolysis.
4OH^- ==> 2H₂O(l) + O₂(g) + 4e^-
Which statement is TRUE about this electrode equation? [eh-13]
1. it is an reduction at the cathode
2. it involves an oxidation at the anode
3. it involves electron gain at the anode
4. it involves electron loss at the cathode
Which of the following is the correctly balanced electrode half equation for the cathode in the electrolysis of acidified water? [eh-15]
1. 2H⁺(aq) + 2e^- ==> H₂(g)
2. 4OH^- ==> 2H₂O(l) + O₂(g) + 4e^-
3. H⁺(aq) + e^- ==> H(g)
4. 2OH^- ==> H₂O(l) + O₂(g) + 2e^-
Which of the following is the correctly balanced electrode half equation for the anode in the electrolysis of acidified water? [eh-16]
1. 2H⁺(aq) + 2e^- ==> H₂(g)
2. 4OH^- ==> 2H₂O(l) + O₂(g) + 4e^-
3. H⁺(aq) + e^- ==> H(g)
4. 2OH^- ==> H₂O(l) + O₂(g) + 2e^-
Which of the following is the correctly balanced electrode half equation for the cathode in the electrolysis of copper(II) sulfate with carbon electrodes? [eh-17]
1. Cu²⁺(aq) + 2e^- ==> Cu(s)
2. Cu(s) ==> Cu²⁺(aq) + 2e^-
3. 4OH^- ==> 2H₂O(l) + O₂(g) + 4e^-
4. 2OH^- ==> H₂O(l) + O₂(g) + 2e^-
5. Cu²⁺(aq) + e^- ==> Cu(s)
6. Cu(s) ==> Cu²⁺(aq) + e^-
Which of the following is the correctly balanced electrode half equation for the anode in the electrolysis of copper(II) sulfate with carbon electrodes? [eh-18]
1. Cu²⁺(aq) + 2e^- ==> Cu(s)
2. Cu(s) ==> Cu²⁺(aq) + 2e^-
3. 4OH^- ==> 2H₂O(l) + O₂(g) + 4e^-
4. 2OH^- ==> H₂O(l) + O₂(g) + 2e^-
5. Cu²⁺(aq) + e^- ==> Cu(s)
6. Cu(s) ==> Cu²⁺(aq) + e^-
Which of the following is the correctly balanced electrode half equation for the anode in the electrolysis of copper(II) sulfate with copper electrodes? [eh-19]
1. Cu²⁺(aq) + 2e^- ==> Cu(s)
2. Cu(s) ==> Cu²⁺(aq) + 2e^-
3. 4OH^- ==> 2H₂O(l) + O₂(g) + 4e^-
4. 2OH^- ==> H₂O(l) + O₂(g) + 2e^-
5. Cu²⁺(aq) + e^- ==> Cu(s)
6. Cu(s) ==> Cu²⁺(aq) + e^-
Which of the following is the correctly balanced electrode half equation for the cathode in the electrolysis of copper(II) sulfate with copper electrodes? [eh-20]
1. Cu²⁺(aq) + 2e^- ==> Cu(s)
2. Cu(s) ==> Cu²⁺(aq) + 2e^-
3. 4OH^- ==> 2H₂O(l) + O₂(g) + 4e^-
4. 2OH^- ==> H₂O(l) + O₂(g) + 2e^-
5. Cu²⁺(aq) + e^- ==> Cu(s)
6. Cu(s) ==> Cu²⁺(aq) + e^-

QUIZ ON ELECTROLYSIS (UK GCSE Chemistry harder Higher Tier level)