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

Which one is the wrong statement?

Options

  1. AAnhydrous A l C l 3 exists as A l 2 C l 6 (dimer)
  2. BAl 2 Cl 6 contains 3c − 4e − bonds
  3. CAnhydrous A l C l 3 fumes in moist air
  4. DAnhydrous A l C l 3 is ionic

Correct answer

D. Anhydrous A l C l 3 is ionic

Step-by-step solution

Anhydrous A l C l 3 exists as A l 2 C l 6 (dimer) White fumes are due to the presence of H C l gas. Anhydrous aluminium chloride is hydrolysed partially with the moisture in the atmosphere to give H C l gas. This H C l combines with the moisture in the air and appears white in colour. A l C l 3 ​ + 3 H 2 ​ O → A l O H 3 ​ + 3 H C l w h i t e f u m e s Thus AlCl 3 is a covalent compound rather than ionic. Fajan's rule states that, small size of cation, higher the charge on cation and large size of anion, greater is

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