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Fertiliser Technology

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

Endothermic
Catalytic
Reversible
Exothermic

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Fertiliser Technology
Phosphorus vapour comprises of

P₄
P₃
P
P₂

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Fertiliser Technology
Tricresyl phosphate is chemically represented as

(NH₄)₂HPO₄
NH₄H₂PO₄
Ca₁₀(PO₄)3F₆
(CH₃ C₆ H₄)₃ PO₄

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Fertiliser Technology
Reaction of cresylic acid with __________ produces tricresyl phosphate.

Phosphorous pentoxide
Calcium phosphate
Phosphorous oxychloride
Ammonium phosphate

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Fertiliser Technology
Maximum nitrogen percentage is in

Liquid ammonia
Urea
Calcium ammonium nitrate
Ammonium sulphate

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Fertiliser Technology
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₂ & H₂ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

Increasing the effectiveness
All of these
Stabilisation
Improving the strength & heat resistance

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