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Chemistry Question on p -Block Elements

Which of the following statements about anhydrous aluminium chloride is correct?

A

It exists as \ceAlCl3\ce{AlCl_3} molecules

B

It is not easily hydrolysed

C

It sublimes at 100∘100^\circ C under vacuum

D

It is a strong Lewis base

Answer

It sublimes at 100∘100^\circ C under vacuum

Explanation

Solution

AlCl3 {AlCl_3} exists as a dimer (Al2Cl6) {(Al_2Cl_6)}. It is a strong Lewis acid as it has an incomplete octet and has a tendency to gain electrons. AlCl3 {AlCl_3} undergoes hydrolysis easily and forms an acidic solution. AlCl3+3H2O−>Al(OH)3+3HCl {AlCl_3 + 3H2O -> Al(OH)3 + 3HCl}