The basic structural unit of feldspar, zeolites, mica, and asbestos is :

 

  • Option 1)

    (SiO_{3})^{2-}

  • Option 2)

    SiO_{2}

  • Option 3)

    (SiO_{4})^{4-}

  • Option 4)

Answers (1)

 

Zeolites -

Hydrated alumino silicate having negative charge which is balanced by cations such as Na+, K+ or Ca2+

- wherein

Eg. ZSM-5

 

 

 

Silicates -

Compounds with basic unit SiO44-, each Si atom is linked to four oxygen atom tetrahedrally, joined by corners

- wherein

Silicates

 

 

 

(i) chemical formula zeolite:  .It is also known as hydrated aluminium silicate.

(ii) Mica : It is a potassium aluminium silicate KAl_{3}Si_{3}O_{10}(OH_{2}).

(iii) asbestos: It is a hydrous magnetium silicate with the chemical composition: Mg_{3}Si_{2}O_{5}(OH)_{ 4}.

(iv) Feldsbar is a potassium silicate KAlSi_{3}O_{8} and there are various sub-types of feldsbar are available in earth crust.

\Rightarrow silicate is a general name given to a group of minerals which have silicon-oxygen bonds with general formula (S_{+}O_{4}^{x-})_{n}

\therefore option (3) is correct

 


Option 1)

(SiO_{3})^{2-}

Option 2)

SiO_{2}

Option 3)

(SiO_{4})^{4-}

Option 4)

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