Fertiliser Technology - Practice Test

(A) All the nitrogenous fertilisers are not soluble in water

(B) A straight fertiliser contains only one nutrient

(C) Calcium cynamide is used as weed killer in onion fields

(D) The phosphorous nutrient makes the plant stem stronger and increases its branches

(E) 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid

(F) Chemically unreactive nature of red phosphorous is due to its polymeric structure

(G) Red phosphorous is the most reactive allotropic form of phosphorous

(H) Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation

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

(J) Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis

(K) Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables

(L) Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis

(M) Dehydration of ammonium carbamate to produce urea is endothermic

(N) Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable

(O) Gypsum (CaSO 4 .2H 2 O) is obtained as a by-product in the wet process for manufacture of ortho-phosphoric acid

(P) Phosphate rock when reacted with dilute H 2 SO 4 produces superphosphate

(Q) Nitrogen is normally supplied in fertiliser either in ammoniacal or the nitrate form, from which the soil takes it up in the form of ammonium ions or nitrate ions and forms amino acids

(R) Calcium present in the fertiliser helps in correcting the soil acidity

(S) Particle size range of a good grannular fertiliser is 10-15 mesh and it contains less moisture as compared to finely divided powder form of fertiliser

(T) Ammonium nitrate fertiliser is obtained as a by-product in an integrated steel plant having by-product coke ovens

(U) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water

(V) Apatite is the principal material present in phosphate rock which is chemically Ca 10 (PO 4 ) 6 (F, Cl, OH)

(W) Urea is more hygroscopic than ammonium nitrate

(X) Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form

Fertiliser Technology - Study Mode

[#1] The optimum size of the ammonia plant is __________ tons/day.

Correct Answer

[#2] Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)

Correct Answer

[#3] Temperature and pressure in urea autoclave is

Correct Answer

[#4] Pick out the wrong statement.

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[#5] Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is

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