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Chemistry Question on p -Block Elements

In potash alum, potassium and aluminium are present as

A

simple cations

B

metal atoms

C

\ce[K(H2O)6]+\ce{[K (H_2O)_6]^{+}} and \ce[Al(H2O)6]3+\ce{ [Al (H_2O)_6]^{3+}} ions

D

none of these

Answer

\ce[K(H2O)6]+\ce{[K (H_2O)_6]^{+}} and \ce[Al(H2O)6]3+\ce{ [Al (H_2O)_6]^{3+}} ions

Explanation

Solution

In potash alum, K+ {K^{+}} and Al3+ {Al^{3+}} are present as hexaaquo complex ions such as [K(H2O)6]+ {[K(H_2O)_6]^{+}} and [Al(H2O)6]3+ {[Al(H_2O)_6]^{3+}}ions.