P Block Elements Question 420
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.
BETA
