In a Galvanic cell, the following reaction takes place: 2H2O ⇋ O2+ 4H+ + 4e it occurs at the
Correct answer: B. Anode
- A. Cathode
- B. Anode
- C. External conductor
- D. Cathode and anode
Explanation
In a Galvanic cell, the redox reaction occurs at two different electrodes, the cathode, and the anode. At the cathode, reduction takes place, which involves the gain of electrons. In the given reaction, the reduction-half reaction is:O2 + 4H+ + 4e- → 2H2OAt the anode, oxidation takes place, which involves the loss of electrons. The oxidation-half reaction is:2H2O → O2 + 4H+ + 4e-This is the oxidation reaction (water loses electrons and produces oxygen + protons).Therefore, this reaction occurs at the anode of the Galvanic cell.
Last updated
About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
Practise Electrochemistry
696 free Electrochemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A 10 volume solution of H2O2 means_______?
A reaction in which the same element is both oxidised and reduced is called
A solution of Sodium Sulphate was electrolyzed using some inert electrode; the products at the electrodes are:
Aluminum is refined in _ cell.
Any process of chemical decay of metals due to the action of surrounding medium is called__________________?