Fertiliser Technology - Chemical Engineering Questions and Answers

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Electric furnace method for production of phosphorous uses phosphate rock

and phosphoric acid

and coke

and sulphuric acid

silica and coke

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Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by

steam reforming of naphtha and cracking of natural gas.

electrolysis of water.

cryogenic separation of hydrogen from coke oven gas.

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

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Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant ?

Urea

CAN

Ammonium sulphate

Superphosphate

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Ammonium phosphate is a __________ fertiliser.

nitrogenous

phosphatic

complex

mixed

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Maximum stability of white phosphorous is at

very high pressure

atmospheric pressure

room temperature

>600°C

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Potassic fertilisers do not promote the development of

stems & leaves during early stage of plant growth.

starches of potatoes & grains.

sugar of fruits & vegetables.

fibrous materials of plants.

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The optimum size of the ammonia plant is __________ tons/day.

100

1000

1000C.

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Main component of bone ash is

calcium sulphate

calcium phosphate

calcium carbonate

sodium phosphate

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Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of

comparatively higher pressure drop.

high cost of the high pressure vessel used for the reactor.

higher pumping cost.

chances of entrainment and disturbance of catalyst bed.