Online Chemical Engineering Test - Fertiliser Technology Test

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Lower temperature and large excess of ammonia in urea melt

increases biuret formation

decreases biuret formation

is undersirable

does not effect biuret formation

[#]

Ammonium sulphate can be produced by reacting gypsum with

ammonia

ammonium carbonate

nitric acid

none of these

[#]

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.

stabilisation

increasing the effectiveness

improving the strength & heat resistance

all a, b & c

[#]

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

[#]

Which of the following gasifiers can be attached to coal based fertiliser plants ?

Lurgi (high pressure) gasifier.

Kopper-Totzek gasifier.

Gasifier working at 20 atm.

Gasifier working at 40 atm.

[#]

Maximum stability of white phosphorous is at

very high pressure

atmospheric pressure

room temperature

>600°C

[#]

A fertiliser contains 82% N₂. It could be

urea

liquid NH₃

ammonium nitrate

none of these

[#]

Which nutrient in fertiliser makes the plant stems stronger and increases branching ?

Nitrogen

Phosphorous

Potassium

Calcium

[#]

Heating a mixture of phosphate rock, coke and sand in an electric furnace produces

phosphoric acid

ammonium phosphate

phosphorous

superphosphate

[#]

10.

Low grade coal is __________ to produce ammonia synthesis gas.

hydrogenated

liquefied

gasified

dehydrogenated

[#]

11.

Main constituent of phosphate rock is

ammonium phosphate

flour apatite

calcium fluoride

calcium phosphate

[#]

12.

Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?

Nitrogeneous fertiliser

Potassic fertiliser

Phosphatic fertiliser

None of these

[#]

13.

Pick out the wrong statement.

Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty.

Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis.

Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables.

Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis.

[#]

14.

Low grade phosphate rock can be used in electrical furnace, because

of the better CaO/SiO₂ balance for slag formation.

CaO content is less.

it is cheap.

it produces low cost product.

[#]

15.

Monte catini process is a widely used process for the manufacture of

urea

calcium ammonium nitrate

triple superposphate

none of these

[#]

16.

The main constituent of rock phosphate is

mono-calcium phosphate

di-calcium phosphate

fluorspar

none of these

[#]

17.

In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable

CaSO₄ .

H₂O and CaSO₄ crystals

pyrophosphoric acid

metaphosphoric acid

all (a), (b) and (c).

[#]

18.

P₂O₅ percentage in the phosphoric acid produced by wet process is about

[#]

19.

The composition of fresh feed to the high temperature, high pressure urea autoclave is

excess liquid ammonia and liquefied CO₂.

excess liquid ammonia and compressed CO₂ gas.

liquid ammonia and excess compressed CO₂.

compressed ammonia gas and excess compressed CO₂.

[#]

20.

Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils ?

Urea

CAN

Ammonium sulphate

Calcium cyanamide

[#]

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Online Chemical Engineering Test - Fertiliser Technology Test

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