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Which one is more acidic in aqueous solution?

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By Expert Faculty of Sri Chaitanya
a
NiCl2
b
FeCl3
c
AlCl3
d
BeCl2

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detailed solution

Correct option is C

AlCl3 is covalent when it is in anhydrous form  but forms ions in aqueous solution due to large hydration energy of Al+3 ion.Al+3 (aq) undergoes hydrolysis to give H3O+


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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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