Q. Heating a mixture of phosphate rock, coke and sand in an electric furnace produces

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Q. A potassic fertiliser contains 50% K₂O. It could be

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Q. Leaching of phosphate rock by strong __________ acid produces phosphoric acid.

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Q. In natural gas, the C/H ratio (by weight) varies in the range of

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Q. Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?

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Q. Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process ?

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Q. 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

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Q. A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.

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Q. An increase in the NH₃/CO₂ ratio in urea manufacture results in

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Q. 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.

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Q. Fertilizer plant getting its hydrogen requirement partly from coke oven gas is situated at

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Q. Nitrogen content of a nitrogenous fertiliser is 35%. It could be

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Q. Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.

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Q. Plant tranquillisers

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Q. Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.

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Q. Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.

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Q. NPK means a __________ fertiliser.

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Q. Potassic fertilisers

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Q. The main constituent of rock phosphate is

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Q. Out of the following, N₂ content is minimum in

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