Fertiliser Technology

131.Potassic fertilisers

1. Are useful during early stage of the plant growth
2. Stimulate early growth and accelerate seeding
3. Help in development of starches of potatoes and grain
4. None of these

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132.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

1. Low bulk density product
2. Biuret formation
3. Non-spherical prills
4. Substantially wet non-flowing and sticky product

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133.Prilling tower is found in the flowsheet for the manufacture of

1. Ammonia
2. Urea
3. Superphosphate
4. Triple superphosphate

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134.Promoter used in NH₃ synthesis catalyst is

1. K₂O
2. SiO₃
3. V₂O₃
4. U₂O₃

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135.Raw materials for nitric acid manufacture are

1. Hydrogen peroxide, air and water
2. Anhydrous ammonia and air
3. Anhydrous ammonia, air and water
4. Wet ammonia, air and water

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136.Raw materials for urea production are

1. CO₂ and N₄
2. CO₂, H₂ and N₄
3. NH₃ and CO
4. HNO₃ and CaCO3

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

1. HNO₃&limestone
2. CO₂&H₂SO₄
3. HNO₃&NH₄Cl
4. CO₂&KNO₃

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138.Reaction of _________ acid with phosphate rock produces superphosphates.

1. Hydrochloric
2. Sulphuric
3. Nitric
4. Phosphoric

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139.Reaction of anhydrous liquid ammonia with ortho-phosphoric acid produces

1. Ammonium phosphate
2. Superphosphate
3. Triple superphosphate
4. None of these

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140.Reaction of calcium Fluorapatite with sulphuric acid produces

1. Ortho-phosphoric acid
2. Simple superphosphate
3. Triple superphosphate
4. Red phosphorous

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