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Al2O3 can be converted to anhydrous AlCl3 by heating

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Al2O3 can be converted to anhydrous AlCl3 by heating

(a) Al2O3 with NaCl in solid state

(b) a mixture of Al2O3 and carbon in dry Cl2 gas

(c) Al2O3 with Cl2 gas

(d) Al2O3 with HCl gas

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Correct answer: (b) a mixture of Al2O3 and carbon in dry Cl2 gas

Explanation:

Al2O3 can be converted to anhydrous AlCl3 by heating a mixture of Al2O3 and carbon in dry Cl2

Al2O3 + 3C + 3Cl2 \(\overset{1000°C}\longrightarrow\) 2AlCl3 + 3CO

2AlCl3 → vapours + cooled → Solid anhydrous aluminium chloride

This post was modified 2 years ago by admin
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