Fertiliser Technology - Chemical Engineering Questions and Answers

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Monte catini process is used for the manufacture of

nitric acid

phosphoric acid

urea

calcium ammonium nitrate (CAN)

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Promoter used in NH3 synthesis catalyst is

K₂O

SiO₃

V₂O₅

U₂O₃

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H₄P₂O₇ is the chemical formula of __________ phosphoric acid.

pyro

ortho

meta

none of these

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Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because

it is hygroscopic and explosive in nature.

it is highly acidic in nature.

it is a liquid at room temperature.

its nitrogen content is very less.

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Phosphatic fertilisers

are useful during early stage of the plant growth.

accelerate fruit formation in later stages of growth.

lessen the effect of excessive nitrogen application.

none of these

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Naphtha in a fertiliser plant is used as a source of

fuel

H₂

N₂

O₂

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Pick out the wrong statement.

Dehydration of ammonium carbamate to produce urea is endothermic.

Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable.

Gypsum (CaSO₄. 2H₂O) is obtained as a by-product in the wet process for manufacture of ortho-phosphoric acid.

Phosphate rock when reacted with dilute H₂SO₄ produces superphosphate.

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Maximum nitrogen percentage is in

ammonium sulphate.

calcium ammonium nitrate.

urea.

liquid ammonia.

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Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent.