P-Block Elements Ques 528

Question: Anhydrous $ AlCl_3 $ cannot be obtained from which of the following reactions?

Options:

A) Heating $ AlCl_3.6H_2O $

B) By passing dry $ HCl $ over hot aluminium powder

C) By passing dry $ Cl_2 $ over hot aluminium powder

D) By passing dry $ Cl_2 $ over a hot mixture of alumina and coke

Show Answer

Answer:

Correct Answer: A

Solution:

$ 2Al+6HCl\xrightarrow{\Delta .air}2AlCl_3+3H_2 $ $ 2Al+3Cl_2\xrightarrow{{}}2AlCl_3 $ $ AlCl_3.6H_2O\xrightarrow{\Delta }Al{{( OH )}_3}+3HCl+3H_2O $ Thus $ AlCl_3 $ cannot be obtained by this method.



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