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  4. In lake test of Al3+ ion, there is formation of coloured floating. It is due to :

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Q. In lake test of $Al^{3+}$ ion, there is formation of coloured floating. It is due to :

The p-Block Elements

Solution:

In lake test of $Al^{3+}$, a coloured floating lake is formed as $Al(OH)_3$ which being a solid surface (suspension), adsorbs litmus colour, resulting in coloured floating lake appearance.