Question:

Name the structure of silicates in which three oxygen atoms of $[SiO_4]^{4-}$ are shared is

Updated On: May 19, 2024
  • pyrosilicate
  • sheet silicate
  • linear chain silicate
  • three-dimensional silicate
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The Correct Option is B

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In sheet silicates, three out of four oxygen of $SiO^{4-}_4$ unit are shared as shown below : In pyrosilicates, there is only one shared oxygen, in linear chain silicates, two oxygen per tetrahedra are shared while in three-dimensional silicates, all four oxygens are shared.
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Two dimensional sheet silicates: In such silicates, three oxygen atoms of each tetrahedral are shared with adjacent \(SiO_4^{4-}\) tetrahedral, such sharing forms two dimensional sheet structure with general formula \((Si_2O_5)_n^{2n-}\)
Ex. Talc \(Mg(Si_2O_5)_2Mg(OH)_2\)
The structure of silicates has been found with the help of X-ray diffraction techniques.
Hence, The correct Answer is option B sheet silicate.

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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: