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JEE Main PAPER - 1

JEE Main · 2018

180 questions · One at a time

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MCQ4 marks

The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting [3Ca3(PO4)2⋅Ca(OH)2][3Ca_3(PO_4)_2 \cdot Ca(OH)_2]   to:

  • A.[3Ca3(PO4)2⋅CaF2][3Ca_3(PO_4)_2 \cdot CaF_2]Correct
  • B.[3[Ca(OH)2]⋅CaF2][3[Ca(OH)_2] \cdot CaF_2]
  • C.[CaF2][CaF_2]
  • D.[3(CaF2)⋅Ca(OH)2][3(CaF_2) \cdot Ca(OH)_2]
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