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      Question

      Which mineral is considered as a secondary

      mineral?
      A Quartz Correct Answer Incorrect Answer
      B Feldspar Correct Answer Incorrect Answer
      C Biotite Correct Answer Incorrect Answer
      D Gibbsite Correct Answer Incorrect Answer

      Solution

      Gibbsite (AlтВВOтВГ┬╖3HтВВO) forms from weathering of primary minerals. Quartz and feldspar are primary.

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