Consider the following cell reactionPb + 2Ag+ Pb2+ + 2AgIf a cell is made based on this equation then
Correct answer: C. silver will act as cathode because it has greater reduction potential
- A. lead will act as anode and silver as cathode
- B. lead will act as cathode and silver as anode
- C. silver will act as cathode because it has greater reduction potential
- D. lead will act as anode because it has lesser reduction potential
Explanation
To determine which element will act as the anode and which as the cathode, you can look at the standard reduction potentials for each half-reaction involved. The half-reaction with a higher standard reduction potential (E) will act as the cathode, while the one with a lower standard reduction potential will act as the anode.The given cell reaction is:Pb+ 2Ag+ Pb2+ + 2AgThe half-reactions involved are:1. Pb Pb2+ +2e-2. 2Ag+ +2e → 2AgLooking at the standard reduction potentials, the reduction potential for the half-reaction involving silver is greater than that of lead (Pb2+ +2e- → Pb). The greater reduction potential indicates a stronger tendency to gain electrons (undergo reduction).So, the correct answer is:silver will act as cathode because it has greater reduction potential
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electrochemistry
Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
Practise Electrochemistry
696 free Electrochemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrochemistry questions
The half cells in an electrochemical cell are interconnected through
The reduction potential of Zn is
Percentage of sulphuric acid in a lead accumulator
Consider the following spontaneous reactionNi2+ + Mn→ Ni + Mn2+.If a voltaic cell is made based on this reaction then conventional representation of the cell will be
Four statements are given below. The correct statement is
Which of the following statements is correct for the life period of a galvanic cell