Q. pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.

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Q. Yield of elemental phosphorous from rock phosphate is about __________ percent.

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Q. Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

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Q. Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is

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Q. Pick out the wrong statement.

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Q. Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH₃

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Q. A nitrogenous fertiliser contains 20% N₂. It could be

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Q. Gas based fertiliser plants use

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Q. Catalyst used in steam reforming of naphtha is

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Q. Which of the following fertilisers contains the least percentage of nitrogen?

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Q. In the manufacture of H₃PO₄ (ortho), ; strong H₂SO₄ leaching wet process as compared to electric furnace process

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Q. Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and

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Q. Which of the following fertilisers is used as a cattle feed?

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Q. Biuret formation in urea is kept at minimum (< 1 %), because it is

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Q. Catalyst used in desulphurisation of naphtha is

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Q. Pick out the correct statement.

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Q. Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

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Q. Rock phosphate used for the production of phosphatic fertiliser is mined at

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Q. CaH₄(PO₄)₂ is the chemical formula of

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Q. Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.

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