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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Q. Fertiliser produced during soda ash manufacture by dual process is ammonium

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Q. Low grade phosphate rock can be used in electrical furnace, because

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Q. Iron is not used alone as a catalyst in ammonia synthesis, because

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Q. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature

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Q. Ammonia synthesis gas is produced from fuel oil by

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Q. P₂O₅ percentage in the phosphoric acid produced by wet process is about

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Q. Catalyst used in the oxidation of ammonia is

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