Fertiliser Technology - Chemical Engineering Questions and Answers

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Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition ?

Electrolysis of water.

Cryogenic removal of H₂ from coke oven gas.

Steam reforming of naphtha.

Natural gas cracking.

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Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.

catalytic

exothermic

endothermic

reversible

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

phosphoric acid

ammonium phosphate

phosphorous

superphosphate

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A potassic fertiliser contains 50% K₂O. It could be

potassium sulphate.

potassium chloride.

a mixture of NaCl+ KCl.

none of these.

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C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about

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Raw materials for urea production are

CO₂ and N₂

CO₂, H₂ and N₂

NH₃ and CO

HNO₃ and CaCO₃

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Which of the following is not a mixed fertiliser ?

Nitrophosphate

Calcium ammonium nitrate (CAN)

Ammonium phosphate

None of these

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Chemical formula of metaphosphoric acid is

H₃PO₄

H₄P₂O₇

HPO₃

same as that of pyrophosphoric acid

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Low grade coal is __________ to produce ammonia synthesis gas.

hydrogenated

liquefied

gasified

dehydrogenated