A. Nitrogen
B. Phosphorous
C. Potassium
D. Carbon
Correct Answer: Nitrogen ✔
Last Updated: March 11, 2019
Related MCQs
- Catalyst used in the manufacture of NH3 by Haber’s process is finely divided__________?
- A fertiliser contains 82% N2. It could be__________?
- The composition of fresh feed to the high temperature, high pressure urea autoclave is__________?
- Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction?
- Potassic fertiliser is graded based on its __________ content?
- Fertiliser produced during soda ash manufacture by dual process is ammonium__________?
- Electric process as compared to wet process (for the manufacture of phosphoric acid) ?
- Rock phosphate constitutes mainly of__________?
- Iron is not used alone as a catalyst in ammonia synthesis, because__________?
- Phosphoric acid is produced in wet process from phosphate rock and__________?
- The optimum size of the ammonia plant is __________ tons/day?
- Out of the following, N2 content is minimum in__________?
- Ammonium sulphate can be produced by reacting gypsum with__________?
- Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because__________?
- NPK means a __________ fertiliser?
- Calcium ammonium nitrate (CAN) is__________?
- Dehydration of ammonium carbamate produces__________?
- P2O5 content in superphosphate is about __________ percent?
- Promoter used in NH3 synthesis catalyst is__________?
- Maximum stability of white phosphorous is at__________?
- Potassic fertilisers__________?
- Which is the most suitable fertiliser for paddy ?
- Catalyst used in ammonia synthesis uses __________ as a promoter?
- A fertiliser plant is classified as a gas based fertiliser plant, when it uses __________ gas as a source of hydrogen for the manufacture of ammonia?
- Commercial fertilisers are available mostly in the form of__________?
- Nitrogenous fertiliser is required__________?
- Ammonia synthesis reaction is__________?
- During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about __________ percent?
- (CH3 C6 H4)3 PO4 is the chemical formula of__________?
- HPO3 is the chemical formula of __________ phosphoric acid?
- Reaction of __________ acid with phosphate rock produces superphosphates?
- Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air?
- Which of the following gasifiers can be attached to coal based fertiliser plants ?
- Phosphatic fertiliser is graded based on its __________ content?
- Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in __________ of the catalyst ?
- Naphtha in a fertiliser plant is used as a source of__________?
- Low grade phosphate rock can be used in electrical furnace, because__________?
- Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by__________?
- Reaction of Cresylic acid with __________ produces Tricresyl phosphate?
- Phosphorus vapour comprises of __________?
- __________ is the most suitable fertiliser for paddy?
- A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous?
- Urea is formed only__________?
- Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis ?
- Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium__________?
- Montecatini process is used for the manufacture of__________?
- Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil?
- Lower temperature and large excess of ammonia in urea melt__________?
- Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of__________?
- The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent?
- Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done?