Question

Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with

a.

acidic refractory

b.

rubber

c.

karbate

d.

lead or acid-proof bricks

Answer: (d).lead or acid-proof bricks

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Q. Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with

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