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1. Some basic concept of chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry1. Some basic concept of chemistry1 Mark
MCQ
Phosphoric acid is prepared comercially from phosphoate ore as following :............... $\mathrm{kg}$

$Ca_3(PO_4)_2 + SiO_2 + C + O_2 + H_2O \to CaSiO_3 + CO_2 + H_3PO_4$

If $1.0\ kg$ each of calcium phosphate and silica are used with excess of $C$ , $O_2$ and $H_2O$ , what is maximum quantity of phosphoric acid that can be produced. $(Ca = 40, P = 31, Si = 28)$

  • A
    $1.1$
  • ✓
    $0.63$
  • C
    $0.31$
  • D
    $1.5$
✓

Answer

Correct option: B.
$0.63$
b
$Ca_3(PO_4)_2 + 3SiO_2 + 5C + 5O_2 + 3H_2O \to  3CaSiO_3 + 5CO_2 + 2H_3PO_4$

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