Fertiliser Technology — Part 1 MCQs with Explanations

Metaphosphoric acid is the correct answer to “Heating of orthophosphoric acid to about 900°C, produces”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Potassium sulphate is the correct answer to “A potassic fertiliser contains 50% K 2 O. It could be”. This question is standard in competitive examination syllabi for Fertiliser Technology.

It will evaporate on spraying is the correct answer to “Liquid ammonia is not used as such a fertiliser in tropical countries like India, because”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Calcium cyanamide is the correct answer to “Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils”. This question is standard in competitive examination syllabi for Fertiliser Technology.

High cost of the high pressure vessel used for the reactor is the correct answer to “Multistage operation (as in the case of catalytic oxidation of SO 2 ) is not carried out for NH 3 synthesis, because of”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Its activity declines rapidly, if heated to above 520°C is the correct answer to “Iron is not used alone as a catalyst in ammonia synthesis, because”. This question is standard in competitive examination syllabi for Fertiliser Technology.

20 is the correct answer to “Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Ammonium phosphate is the correct answer to “Which of the following fertilisers contains the least percentage of nitrogen”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Increasing the temperature is the correct answer to “Conversion achieved in HNO 3 synthesis with the use of platinum catalyst is about 95 - 97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Ammonium phosphate is the correct answer to “Reaction of anhydrous liquid ammonia with orthophosphoric acid produces”. This question is standard in competitive examination syllabi for Fertiliser Technology.

1000 is the correct answer to “The optimum size of the ammonia plant is __________ tons/day.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Gasify coal to get hydrogen from coal gas is the correct answer to “Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)”. This question is standard in competitive examination syllabi for Fertiliser Technology.

190°C and 200 atm is the correct answer to “Temperature and pressure in urea autoclave is”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Exothermic is the correct answer to “Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Phosphorous oxychloride is the correct answer to “Reaction of cresylic acid with __________ produces tricresyl phosphate.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Nickel is the correct answer to “Catalyst used in steam reforming of naphtha is”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Potassic fertiliser is the correct answer to “Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Sindri (under FCI) is the correct answer to “Fertiliser plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located at”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Maintain H2 : N2 ratio at 3 : 1 is the correct answer to “In an ammonia plant, the purge off is essential to”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Sulphur is the correct answer to “Which of the following is not a measure component necessarily to be present in fertilisers”. This question is standard in competitive examination syllabi for Fertiliser Technology.

NO2 is the correct answer to “Color of nitric acid is light yellow due to the presence of”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Endothermic is the correct answer to “Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Na5P3O10 is the correct answer to “Sodium tri poly phosphate (STPP) is chemically represented as”. This question is standard in competitive examination syllabi for Fertiliser Technology.

All of the above is the correct answer to “Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

250-400 is the correct answer to “Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Ferrous sulphate is the correct answer to “__________ is not a fertiliser.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Exothermic is the correct answer to “Formation of ammonium carbamate by reaction of NH 3 with CO 2 is a/an __________ reaction.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat) is the correct answer to “Largest capacity nitrogenous fertiliser plants (2700 tons of NH 3 per day) (2 Nos) in India are located at”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Triple superphosphate is the correct answer to “CaH 4 (PO 4 ) 2 is the chemical formula of”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Endothermic is the correct answer to “Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

46 is the correct answer to “Nitrogen content of urea is about __________ percent.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Either A or B is the correct answer to “Leaching of phosphate rock by strong __________ acid produces phosphoric acid.”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Exothermic is the correct answer to “Ammonia synthesis reaction is”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer is the correct answer to “Ammonium nitrate is”. This question is standard in competitive examination syllabi for Fertiliser Technology.

By fractionation of liquified air is the correct answer to “Fertiliser plants get their N 2 requirements”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Is used less frequently is the correct answer to “Electric process as compared to wet process (for the manufacture of phosphoric acid)”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Avoid caking & hardening is the correct answer to “Conditioners like finely divided peat are added to the fertiliser to”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Natural gas as a source of hydrogen is the correct answer to “Gas based fertiliser plants use”. This question is standard in competitive examination syllabi for Fertiliser Technology.

It is hygroscopic and explosive in nature is the correct answer to “Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because”. This question is standard in competitive examination syllabi for Fertiliser Technology.

Phosphoric is the correct answer to “Triple superphosphate is made by reacting phosphate rock with __________ acid.”. This question is standard in competitive examination syllabi for Fertiliser Technology.