A. Reduced iron oxide
B. Nickel
C. Vanadium pentoxide
D. Silica gel
Correct Answer: Reduced iron oxide ✔
Last Updated: March 11, 2019
Related MCQs
- P2O5 percentage in the phosphoric acid produced by wet process is about__________?
- CO2 present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in __________?
- The essential ingredient of all the synthesis gas is__________?
- Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________?
- During conversion of ammonium carbamate into urea, presence of large excess of water__________?
- Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa) ?
- Temperature and pressure in urea autoclave is__________?
- __________ is the undesirable by-product produced in the manufacture of urea ?
- A Potassic fertiliser contains 50% K2O. It could be __________?
- Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in__________?
- Which nutrient in fertiliser makes the plant stems stronger and increases branching ?
- Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the __________?
- In natural gas, the C/H ratio (by weight) varies in the range of__________?
- CaH4(PO4)2 is the chemical formula of __________?
- C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about__________?
- Temperature and pressure in ammonia converter is__________?
- Raw materials for urea production are __________?
- Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an __________ reaction?
- Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C?
- A phosphatic fertiliser contains 16% P2O5. It could be__________?
- Reaction of ortho-phosphoric acid with phosphate rock produces __________?
- Biuret formation in urea is kept at minimum (< 1 %), because it is__________?
- Effectiveness of a fertiliser is independent of the __________?
- Which is the best fertiliser for paddy ?
- Action of phosphoric acid on rock phosphate produces__________?
- Optimum reaction temperature in steam reforming of naphtha is __________ °C?
- In calcium ammonium nitrate (CAN) fertiliser __________?
- Catalyst used in desulphurisation of naphtha is__________?
- Steam reforming of naphtha is a source of hydrogen production for nitrogenous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha ?
- Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber’s process ?
- Which of the following does not come under the category of ‘secondary nutrient’ for plant growth ?
- Which of the following fertilizers is used as a cattle feed ?
- Hydrogen content of coke oven gas is __________ percent?
- Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?
- Ammonium sulphate fertiliser is __________?
- Urea (a nitrogenous fertiliser) is produced from carbon dioxide and__________?
- Two gas based fertiliser plants are located in India are__________?
- Yield of elemental phosphorous from rock phosphate is about __________ percent?
- P2O5 content in triple superphosphate is about __________ percent?
- __________ is not a fertiliser?
- Urea is represented as__________?
- Reaction of ortho-phosphoric acid with soda ash produces__________?
- Phosphatic fertilisers__________?
- Reaction of nitric acid and sulphuric acid with phosphate rock produces__________?
- Red phosphorous is changed into white phosphorous by__________?
- NPK fertiliser is a __________ fertiliser?
- Montecatini process is a widely used process for the manufacture of __________?
- Which is a catalyst promoter used in catalytic ammonia synthesis reaction ?
- Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent?
- __________ is required more for leafy crops?
- Catalyst used in the manufacture of NH3 by Haber’s process is finely divided__________?