Q. 5-10-5 fertilisers mean that they contain

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Q. __________ catalyst is used in the production of urea from CO₂ and NH₃.

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Q. Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils ?

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Q. Raw materials for nitric acid manufacture are

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Q. With increases in pressure, the conversion of ammonium carbamate into urea

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Q. Steam reforming of naphtha produces ammonia synthesis gas. This is a/an __________ process.

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Q. Tricresyl phosphate is chemically represented as

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Q. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

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Q. __________ is required more for leafy crops.

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Q. The composition of fresh feed to the high temperature, high pressure urea autoclave is

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Q. Which of the following does not come under the category of 'micro-nutrient' for plant growth?

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Q. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of

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Q. Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by

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Q. In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable

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Q. Reaction of nitric acid and sulphuric acid with phosphate rock produces

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Q. Reaction of __________ acid with phosphate rock produces superphosphates.

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Q. Monte catini process is a widely used process for the manufacture of

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Q. Which of the following solvents is used for the extraction of H₃PO₄ from CaCl₂ solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?

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Q. Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ?

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Q. In an ammonia plant, the purge off is essential to

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