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Question

Aluminium chloride exists as a dimer, Al2Cl6 in a solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives:

A
Al3++3Cl
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B
[Al(H2O)6]3++3Cl
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C
[Al(OH)6]3+3HCl
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D
Al2O3+6HCl
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Solution

The correct option is B [Al(H2O)6]3++3Cl

The aluminium chloride reacts with the water rather than just dissolving in it. In the first instance, hexaaquaaluminium ions are formed together with chloride ions.

Al2Cl6+H2O[A1(H2O)6]3++3C1

Hence option B is correct.


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