Question:

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

Updated On: Jul 6, 2022
  • adsorption of litmus by $\ce{H2O}$
  • adsorption of litmus by $\ce{Al(OH)3}$
  • adsorption of litmus by $\ce{Al(OH)4^{-}}$ -
  • none of these
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The Correct Option is B

Solution and Explanation

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.
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Top Questions on p -Block Elements

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Notes on p -Block Elements

Concepts Used:

P-Block Elements

  • P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
  • P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of: