Fertiliser Technology - Chemical Engineering Questions and Answers

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Ammonium phosphate is a __________ fertiliser.

Nitrogenous

Phosphatic

Complex

Mixed

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Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

Osmotic pressure of the soil water becomes less than that of the plant sap

Soil becomes too alkaline

Osmotic pressure of the soil water becomes higher than that of the plant sap

Soil becomes too acidic

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Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?

Water

Naphtha

Tar

Coal/coke oven gas

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__________ catalyst is used in the production of urea from CO₂ and NH₃.

Vanadium pentoxide

Alumina

Nickel

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Nitrolime is chemically known as

Calcium nitrate

Ammonium nitrate

Calcium ammonium nitrate (CAN)

None of these

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Which is the most suitable fertiliser for paddy?

CAN

Ammonium sulphate

Ammonium nitrate

Superphosphate

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Urea is formed only

In liquid phase

In vapour phase

At very high temperature

At very low pressure (vacuum)

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Urea is represented as

NH₂.CO.NH₂

NH₃CO.CH₃

NH.CO₂.NH

NH₃.CO₂.NH₃

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A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.

Salt & coke

Sand & coke

And coke

And sand