Fertiliser Technology - Chemical Engineering Questions and Answers

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Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.

50-80

250-400

1000-1200

800-900

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Commercial fertilisers are available mostly in the form of

powder

grannules

lumps

flakes

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Pick out the wrong statement.

All the nitrogenous fertilisers are not soluble in water.

A straight fertiliser contains only one nutrient.

Calcium cynamide is used as weed killer in onion fields.

The phosphorous nutrient makes the plant stem stronger and increases its branches.

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Ammonia synthesis gas is produced from natural gas by

thermal cracking

steam reforming

partial oxidation

hydrogenation

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Catalyst used in the manufacture of NH₃ by Haber's process is finely divided

nickel

iron

vanadium pentoxide

alumina

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Red phosphorous is changed into white phosphorous by

heating in presence of light.

melting under pressure.

vaporisation followed by condensation.

none of these.

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Urea is represented as

NH₂.CO.NH₂

NH₃CO.CH₃

NH.CO₂.NH

NH₃.CO₂.NH₃

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Two gas based fertiliser plants are located in

Maharashtra and Gujarat

Maharashtra and Orissa

Gujarat and Madhya Pradesh

Jharkhand and Chattisgarh

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Fertiliser plants get their N₂ requirements

by fractionation of liquified air.

by dissociating oxides of nitrogen.

from coal gas (coke oven gas).

from producer gas.