Chemical Engineering :: Fertiliser Technology
- Reaction of phosphate rock with 98% H₂SO₄ produces
- Reaction of calcium fluorapatite with sulphuric acid produces
- Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in
- Pick out the wrong statement.
- Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?
- __________ is the undesirable by-product produced in the manufacture of urea.
- In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process
- Raw materials for urea production are
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A.
'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid |
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B.
Chemically unreactive nature of red phosphorous is due to its polymeric structure |
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C.
Red phosphorous is the most reactive allotropic form of phosphorous |
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D.
Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation |