Which of the following is the correct order with respect to the property indicated?
Show Hint
- Cl>F (Ionisation energy)
- K₂O>Na₂O>Al₂O₃ (Basic nature)
- K>Na>Mg>Al (Metallic character)
- None of these
The Correct Option is B
Solution and Explanation
- Ionisation energy: F has the highest ionisation energy because of its small size, followed by Cl.
- Basic nature: As we move down the group, the basic nature increases due to the increasing ionic size and decreasing bond strength. Thus, K₂O>Na₂O>Al₂O₃ is the correct order for basic nature.
- Metallic character: The metallic character decreases from left to right across the period and increases from top to bottom. Therefore, K>Na>Mg>Al is the correct order for metallic character.
Step 2: Conclusion.
The correct answer is (2) K₂O>Na₂O>Al₂O₃ (Basic nature) as per the analysis above.
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