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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 13 & 14)Practice

Pyroxenes are class of silicate minerals, which exhibit a polymeric chain structure, as shown below Its simplest repeating unit is

Options

  1. A[ S i O 4 ] 4 -
  2. B[ S i O 3 ] 2 -
  3. C[ S i 2 O 7 ] 6 -
  4. D[ S i 4 O 11 ] 6 -

Correct answer

B. [ S i O 3 ] 2 -

Step-by-step solution

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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