Fertiliser Technology

11._________ catalyst is used in the production of urea from CO₂ and NH₃.

1. Vanadium pentoxide
2. No
3. Alumina
4. Nickel

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12._________ is not a fertiliser.

1. Calcium ammonium nitrate
2. Ferrous sulphate
3. Liquid ammonia
4. Ammonium sulphate

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13._________ is required more for leafy crops.

1. Nitrogen
2. Phosphorous
3. Potassium
4. Carbon

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14._________ is the most suitable fertiliser for paddy.

1. Urea
2. Ammonium sulphate
3. Superphosphate
4. Potassium nitrate

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15._________ is the undesirable by-product produced in the manufacture of urea.

1. Ammonium carbonate
2. Biuret
3. Carbon dioxide
4. Ammonium carbamate

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16.(CH₃ C₆ H₄)3 PO₄ is the chemical formula of

1. Triple superphosphate
2. Tricresyl phosphate
3. Fluorapatite
4. Superphosphate

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17.5-10-5 fertilisers mean that they contain

1. 5, 10, 5% respectively of N₂, P₂O₅ and K₂O
2. Only 5 to 10% active fertiliser constituents
3. 5 to 10% filler&carrier of soil conditioners
4. None of these

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18.A fertiliser contains 82% N₂. It could be

1. Urea
2. Liquid NH₃
3. Ammonium nitrate
4. None of these

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19.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.

1. Coke oven
2. Producer
3. Natural
4. Coal

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20.A mixture of phosphate rock _________ is heated in an electric furnace to produce phosphorous.

1. Salt&coke
2. Sand&coke
3. And coke
4. And sand

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