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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 13 & 14)Practice

A l C l 3 achieves stability by forming a dimer. In trivalent state the compound is hydrolysed in water. A l C l 3 in acidified aqueous solution forms

Options

  1. AA l O H 3 + H C l
  2. B[ A l H 2 O 6 3 + + 3 C l -
  3. CA l C l 3 . 2 H 2 O
  4. DA l 2 O 3 + H C l

Correct answer

B. [ A l H 2 O 6 3 + + 3 C l -

Step-by-step solution

A l C l 3 in acidified aqueous solution forms A l H 2 O 6 3 + ion. A l C l 3 + 9 H 2 O → A l H 2 O 6 O H 3 + 3 H + + 3 C l -

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