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NEET 2007
Exam
NEET
Year
2007
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

NEET 2007 · Chemistry · p Block Elements (Group 13 & 14)

Which of the following anions is present in the chain structure of...

Which of the following anions is present in the chain structure of silicates?Which of the following anions is present in the chain structure of silicates?Which of the following anions is present in the chain structure of silicates?

Options

  1. A(Si2O52−)n\left(\mathrm{Si}_2 \mathrm{O}_5^{2-}\right)_n
  2. B(SiO32−)n\left(\mathrm{SiO}_3^{2-}\right)_n
  3. CSiO44−\mathrm{SiO}_4^{4-}
  4. DSi2O76−\mathrm{Si}_2 \mathrm{O}_7^{6-}

Correct answer

B. (SiO32−)n\left(\mathrm{SiO}_3^{2-}\right)_n

Step-by-step solution

In silicates, two oxygen atoms per SiO4\mathrm{SiO}_4 tetrahedron are shared giving polymeric anion chains. When each tetetrahedron ((SiO44−))sharestwoOatoms,infinitechainsareformed.\left(\mathrm{SiO}_{4}^{4-}\right)) shares two O atoms, infinite chains are formed. The formula of these extended anions approximates to (\left(\mathrm{SiO}_{3}\right)_n^{2 n-}) or (\left(\mathrm{SiO}_{3}^{2-}\right)_n . \mathrm{SiO}_{4}4−)anionispresentinorthosilicates.(^{4-}) anion is present in orthosilicates. (\mathrm{Si}_{2} \mathrm{O}_{7}6−)anionispresentinpyrosilicates,while((Si2O52−)n)anionispresentindouble−chainsilicatesaswellasinsheetsilicates.Structureofsilicate:<imgsrc="/api/proxy−image?url=https^{6-}) anion is present in pyrosilicates, while (\left(\mathrm{Si}_{2} \mathrm{O}_{5}^{2-}\right)_n) anion is present in double-chain silicates as well as in sheet silicates. Structure of silicate: <img src="/api/proxy-image?url=https%3A%2F%2Ffirebasestorage.googleapis.com%2Fv0%2Fb%2Fquantrexacademy-app.firebasestorage.app%2Fo%2Fquestions%252Ffigs%252Fpyq%252Fneet%252FkBSAb1n3DMWCNbi0pZx0KukTrJGSA0b0b1F_IeaSeIU.original.fullsize.png%3Falt%3Dmedia&clean=1&v=wm2" data-qx-orig-src="https://firebasestorage.googleapis.com/v0/b/quantrexacademy-app.firebasestorage.app/o/questions%2Ffigs%2Fpyq%2Fneet%2FkBSAb1n3DMWCNbi0pZx0KukTrJGSA0b0b1F_IeaSeIU.original.fullsize.png?alt=media" data-qx-storage-src="https://firebasestorage.googleapis.com/v0/b/quantrexacademy-app.firebasestorage.app/o/questions%2Ffigs%2Fpyq%2Fneet%2FkBSAb1n3DMWCNbi0pZx0KukTrJGSA0b0b1F_IeaSeIU.original.fullsize.png?alt=media"><br>
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