Fertiliser Technology

21.A nitrogenous fertiliser contains 20% N₄. It could be

1. Ammonium nitrate
2. Calcium ammonium nitrate (CAN)
3. Urea
4. Ammonium chloride

22.A phosphatic fertiliser contains 16% P₂O₅. It could be

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

23.A Potassic fertiliser contains 50% K₂O. It could be

1. Potassium sulphate
2. Potassium chloride
3. A mixture of NaCl + KCl
4. None of these

24.Action of phosphoric acid on rock phosphate produces

1. Superphosphate
2. Triple superphosphate
3. Nitrophosphate
4. Diammonium phosphate

25.Ammonia synthesis gas is produced from fuel oil by

1. Steam reforming
2. Hydro-cracking
3. Partial oxidation
4. Hydrogenation

26.Ammonia synthesis gas is produced from natural gas by

1. Thermal cracking
2. Steam reforming
3. Partial oxidation
4. Hydrogenation

27.Ammonia synthesis reaction is

1. Exothermic
2. Endothermic
3. Autocatalytic
4. None of these

28.Ammonium nitrate (a fertiliser) is coated with limestone powder to

1. Increase its nitrogen content
2. Cut down its production cost
3. Avoid the risk of explosion
4. Add extra nutrient as fertiliser

29.Ammonium nitrate is

1. Having about 40% N₄
2. Not hygroscopic
3. Not prone to explosive thermal decomposition
4. Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer

30.Ammonium phosphate is a _________ fertiliser.

1. Nitrogenous
2. Phosphatic
3. Complex
4. Mixed