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Question: Answered & Verified by Expert
Pyroxenes are class of silicate minerals, which exhibit a polymeric chain structure, as shown below

Its simplest repeating unit is
Chemistryp Block Elements (Group 13 & 14)JEE Main
Options:
  • A [SiO4]4-
  • B [SiO3]2-
  • C [Si2O7]6-
  • D [Si4O11]6-
Solution:
1901 Upvotes Verified Answer
The correct answer is: [SiO3]2-
In pyroxenes, there is a total of 3 oxygen atoms per silicon atom, so the simplest repeating unit is SiO 3 2 or SiO 3 n 2n

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