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NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice

Which of the following oxides are acidic ? CuO, Mn 2 O 7 , CO, SO 2 , CrO 3

Options

  1. ACrO 3 , Mn 2 O 7 and SO 2
  2. BOnly SO 2
  3. CMn 2 O 7 and SO 2
  4. DCO and SO 2

Correct answer

A. CrO 3 , Mn 2 O 7 and SO 2

Step-by-step solution

C u O is basic oxide and C O is neutral oxide. CrO 3 + H 2 O → H 2 CrO 4 Acid SO 2 + H 2 O → H 2 SO 3 acid Mn 2 O 7 + H 2 O → 2 HMnO 4 acid

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