Q. Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium

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Q. Ammonium sulphate fertiliser is

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Q. Lower temperature and large excess of ammonia in urea melt

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Q. Superphosphate is manufactured by reacting phosphate rock with

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Q. Vetrocoke solution is

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Q. In calcium ammonium nitrate (CAN) fertil-ser

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Q. Reaction of dilute sulphuric acid with phosphate rock produces

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Q. Phosphoric acid is produced in wet process from phosphate rock and

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Q. Base suspension fertiliser essentially contains

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Q. Conditioners like finely divided peat are added to the fertiliser to

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Q. Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

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Q. Pick out the wrong statement.

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

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Q. Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha ?

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Q. (CH₃C₆H₄)₃PO₄ is the chemical formula of

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Q. Which is a catalyst promoter used in catalytic ammonia synthesis reaction ?

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Q. Phosphorus vapour comprises of

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Q. Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.

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Q. Commercial fertilisers are available mostly in the form of

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Q. Pick out the wrong statement.

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