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NEET CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

Question

Which of the following is the most basic oxide?

A

Al₂O₃

B

Sb₂O₃

C

Bi₂O₃

D

SeO₂

Step-by-Step Solution

  1. Analyze Periodic Trends: Metallic oxides are generally basic, while non-metallic oxides are acidic. Within a group, basic character increases down the group as metallic character increases. Across a period, acidic character increases.
  2. Analyze Al2O3Al_2O_3 (Aluminium Oxide): Aluminium is amphoteric. Al2O3Al_2O_3 reacts with both acids and bases [Class 12 Chemistry, Unit 4, Sec 4.4]. It is amphoteric.
  3. Analyze Sb2O3Sb_2O_3 (Antimony(III) Oxide): Antimony is a metalloid (Group 15). Its oxide is amphoteric.
  4. Analyze SeO2SeO_2 (Selenium Dioxide): Selenium is a non-metal (Group 16). Non-metallic oxides are acidic. SeO2SeO_2 is acidic.
  5. Analyze Bi2O3Bi_2O_3 (Bismuth(III) Oxide): Bismuth is a metal (Group 15, below Antimony). As we move down Group 15, the metallic character increases (N<P<As<Sb<BiN < P < As < Sb < Bi). Consequently, the basic nature of their oxides increases. Bi2O3Bi_2O_3 is purely basic.
  6. Conclusion: Among the given options, Bi2O3Bi_2O_3 is the only purely basic oxide.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Organic Chemistry – Some Basic Principles and Techniques . Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques following

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A.$\text{BCl}_3$ and $\text{BrCl}_3$
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