Chemical Test on Fertilizer Technology - Set 13 - ObjectiveBooks

Chemical Test on Fertilizer Technology - Set 13

Practice Test: Question Set - 13


1. Temperature and pressure in ammonia converter is

    (A) 200 atm, 1000°C
    (B) 450 atm, 200°C
    (C) 450 atm, 550°C
    (D) 450 atm, 1000°C

2. Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an __________ reaction.
    (A) Catalytic
    (B) Exothermic
    (C) Endothermic
    (D) Reversible

3. C/H ratio (by weight) of naphtha used in nitrogenous fertilizer making is about

    (A) 2
    (B) 6
    (C) 13
    (D) 20

4. Raw materials for urea production are

    (A) CO2 and N2
    (B) CO2, H2 and N2
    (C) NH3 and CO
    (D) HNO3 and CaCO3

5. Rock phosphate used for the production of phosphatic fertilizer is mined at (INDIA):

    (A) Amjhor (Jharkhand)
    (B) Talcher (Orissa)
    (C) Bailladella (M.P.)
    (D) Kiriburu (Bihar)

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

    (A) Superphosphate
    (B) Triple superphosphate
    (C) Calcium phosphate
    (D) Meta phosphoric acid

7. A Potassic fertilizer contains 50% K2O. It could be

    (A) Potassium sulphate
    (B) Potassium chloride
    (C) A mixture of NaCl + KCl
    (D) None of these

8. In natural gas, the C/H ratio (by weight) varies in the range of

    (A) 3-4
    (B) 8-10
    (C) 15-17
    (D) 20-25

9. 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

    (A) Low bulk density product
    (B) Biuret formation
    (C) Non-spherical prills
    (D) Substantially wet non-flowing and sticky product

10. Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the

    (A) Presence of an inert atmosphere
    (B) Presence of a reducing atmosphere
    (C) Absence of air
    (D) Presence of an oxidizing atmosphere

11. Which nutrient in fertilizer makes the plant stems stronger and increases branching?

    (A) Nitrogen
    (B) Phosphorous
    (C) Potassium
    (D) Calcium

12. Which of the following is a natural inorganic fertilizer?

    (A) Chile salt petre
    (B) Oilcake
    (C) Gobar manure
    (D) None of these

13. Which of the following does not come under the category of ‘primary nutrient' for plant growth?

    (A) Potassium
    (B) Nitrogen
    (C) Phosphorous
    (D) Sulphur

14. 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

    (A) Decreasing the pressure
    (B) Decreasing the temperature
    (C) Increasing the temperature
    (D) None of these

15. Liquid ammonia is not used as such a fertilizer in tropical countries like India, because
    (A) Its N2 content is very low
    (B) It is very costly
    (C) It will evaporate on spraying
    (D) It is not available

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