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NTA Abhyas NEET2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

Among A l 2 O 3 , S i O 2 , P 2 O 3 and S O 2 the correct order of acid strength is

Options

  1. AA l 2 O 3 < S i O 2 < S O 2 < P 2 O 3
  2. BA l 2 O 3 < S i O 2 < P 2 O 3 < S O 2
  3. CS i O 2 < S O 2 < A l 2 O 3 < P 2 O 3
  4. DS O 2 < P 2 O 3 < S i O 2 < A l 2 O 3

Correct answer

B. A l 2 O 3 < S i O 2 < P 2 O 3 < S O 2

Step-by-step solution

While moving along a group from top to bottom, acidic nature of oxides decreases and along a period left to right, acidic nature increases. So, A l 2 O 3 < S i O 2 < P 2 O 3 < S O 2

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