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Question

Phosphoric acid is prepared on large scale from __________.

A
phosphorus
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B
dolomite
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C
phosphorite
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D
malachite
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Solution

The correct option is B phosphorite
Phosphoric acid is prepared on large scale from phosphorite, an ore of phosphorus or fluorapatite, known as phosphate rock, 3Ca3(PO4)2.CaF2, by the addition of concentrated (93%) sulfuric acid in a series of well-stirred reactors.
Option C is correct.

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