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Al2O3 can be converted to anhydrous AlCl3 by heating

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By Expert Faculty of Sri Chaitanya
a
a mixture of Al2O3 and carbon in dry Cl2 gas
b
Al2O3 with Cl2 gas
c
Al2O3 with HCl gas
d
Al2O3 with NaCl in solid state

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detailed solution

Correct option is A

Al2O3   +  3C  +  3Cl2  →10000C  2AlCl3 +  3COvapours


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The bond dissociation energy of BF bond in BF3 is 646 kJ mol–1 whereas that of CF in CF4 is 315 kJ mol–1. The correct reason for higher B-F bond dissociation energy as compared to that of C-F bond is :

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