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General Principles and Processes of Isolation of Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryGeneral Principles and Processes of Isolation of Elements1 Mark
MCQ
Phosphoric acid is prepared on large scale from $......$
  • A
    Phosphorus
  • B
    Dolomite
  • ✓
    Phosphorite
  • D
    Malachite
✓

Answer

Correct option: C.
Phosphorite
Phosphoric acid is prepared on large scale from phosphorite, an ore of phosphorus or fluorapatite, known as phosphate rock$, 3 \mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2 \cdot \mathrm{CaF}_2,$ by the addition of concentrated $(93\%)$ sulfuric acid in a series of well-stirred reactors.

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