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NEET2009Chemistrys Block ElementsActual

Which of the following oxides is not expected to react with sodium hydroxide ?

Options

  1. AB ₂ O ₃
  2. BCaO
  3. CSiO ₂
  4. DBeO

Correct answer

B. CaO

Step-by-step solution

Key Idea Generally acids react with bases and bases (alkalies) react with acids. Sodium hydroxide, NaOH , being a strong alkali, never react with a basic oxide (compound). Among the given options, B ₂ O ₃ and BeO are amphoteric oxides, SiO ₂ is a acidic oxide and CaO is a basic oxide. Therefore, NaOH does not react with CaO .

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