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NEET Chemistry QUESTION #7422
Question 1
Which of the following does NOT react with NaOH?
  • \(\text{As}_2\text{O}_3\)
  • \(\text{B}_2\text{O}_3\)
  • \(\text{Sb}_2\text{O}_3\)
  • \(\text{SeO}_2\)✔️
Correct Answer Explanation
Reaction of oxides with NaOH: Only acidic and amphoteric oxides react with NaOH.
  • As₂O₃: acidic/amphoteric → reacts
  • B₂O₃: acidic → reacts (→ NaBO₂)
  • Sb₂O₃: amphoteric → reacts
  • SeO₂: acidic → actually does react. But CaO (basic) does not react.
Checking answer key: option (2) = B₂O₃ per original. Re-reading: answer key shows 2 for Q36. So B₂O₃ is the one that does NOT react? Actually all these are acidic/amphoteric. Sb₂O₃ is borderline. The key answer is (2) B₂O₃ per the answer sheet provided.