Question

The oxidation potentials of A and B are +2.37 V and +1.66 V respectively. In chemical reactions

• A. A will be replaced by B
• B. A will replace B
• C. A will not replace B
• D. A and B will not replace each other

Hint:

Key Exam Tip:
In displacement reactions, the more reactive element (or substance) displaces the less reactive element. Reactivity can be determined by:
• Oxidation Potential: A higher (more positive) oxidation potential means greater tendency to oxidize, hence higher reactivity.
• Reduction Potential: A lower (more negative) reduction potential means greater tendency to oxidize, hence higher reactivity. In this case, A has a higher oxidation potential than B, so A is more reactive.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Oxidation potential represents the ease with which a metal can lose electrons.
A higher oxidation potential indicates a more reactive metal and a stronger reducing agent.
Step 2: Detailed Explanation:
Given:
Oxidation Potential of \( A = +2.37 \, V \)
Oxidation Potential of \( B = +1.66 \, V \)
Since \( 2.37 \, V>1.66 \, V \), metal A is more reactive than metal B.
In a displacement reaction, a more reactive metal will displace a less reactive metal from its salt solution.
Step 3: Detailed Explanation:
This means metal A can undergo oxidation (\( A \rightarrow A^{n+} + ne^- \)) more easily than B.
When A is added to a solution containing ions of B (\( B^{m+} \)), A will reduce the ions of B to metallic B while A dissolves into the solution.
Reaction: \( A + B^{m+} \rightarrow A^{n+} + B \)
Step 4: Final Answer:
Because A has the higher oxidation potential, A will replace (displace) B from its solution.