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Fertiliser Technology

Fertiliser Technology
Heating of orthophosphoric acid to 250°C produces

Metaphosphoric acid
Pyrophosphoric acid
No change in it
None of these

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Fertiliser Technology
Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.

Exothermic
Reversible
Endothermic
Catalytic

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Fertiliser Technology
In natural gas, the C/H ratio (by weight) varies in the range of

43894
20-25
15-17
44053

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Fertiliser Technology
Rock phosphate constitutes mainly of

Di-ammonium phosphate
Fluorapatite
Mono-calcium phosphate
Di-calcium phosphate

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Fertiliser Technology
Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.

25
80
50
10

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Fertiliser Technology
Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and

Ammonium nitrate
Nitric acid
Ammonia
Nitric oxide

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