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Aluminum chloride exists as dimer $$(Al_{2}Cl_{6})$$ in the solid state as well as in solution Anhydrous aluminum chloride is hydrolyzed partly with the moisture in the atmosphere to give $$HCl$$ gas. This $$HCl$$ combines with the moisture in the air appears white in color of non-polar solvents such as benzene. When dissolved in water, it gives:


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

The correct option is A $$[Al\left ( H_{2}O \right )_{6}]^{3+}+3H{Cl}$$
Aluminium chloride exists as dimer $$(Al_{2}Cl_{6})$$ in a solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives
$$[Al\left ( OH \right )_{6}]^{3-}+3HCl$$
$$Al_{2}Cl_{6}+ 12 H_2O \rightarrow 2[Al\left ( OH \right )_{6}]^{3-}+12HCl$$
Thus aluminum chloride is hydrolyzed to form the complex ion containing s hydroxide groups.

Chemistry

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