Fertilizer Technology Computer Based mcq Test - Set 07 - ObjectiveBooks

Fertilizer Technology Computer Based mcq Test - Set 07

Practice Test: Question Set - 07


1. Triple superphosphate which contains about 46% P2O5 is produced by the reaction of phosphate rock with ortho phosphoric acid of________ percent concentration.
    (A) 25-28
    (B) 52-54
    (C) 75-80
    (D) > 98

2. Fertilizer plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located in India at
    (A) Rourkela (under SAIL)
    (B) Bokaro (under SAIL)
    (C) Sindri (under FCI)
    (D) Baroda (under G.S.F.C.)

3. Promoter used in NH3 synthesis catalyst is
    (A) K2O
    (B) SiO3
    (C) V2O5
    (D) U2O3

4. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature
    (A) Rate of reaction is very low
    (B) Very high pressure is required resulting in costly pressure vessel
    (C) Space velocity of gas is very low resulting in decreased conversion
    (D) None of these

5. Pick out the wrong statement.
    (A) All the nitrogenous fertilizers are not soluble in water
    (B) A straight fertilizer contains only one nutrient
    (C) Calcium cyanamide is used as weed killer in onion fields
    (D) The phosphorous nutrient makes the plant stem stronger and increases its branches

6. Fertilizer value of a nitrogenous fertilizer is expressed in terms of its __________ content.
    (A) N2
    (B) KNO3
    (C) NO2
    (D) NHO3

7. P2O5 content in superphosphate is about __________ percent.
    (A) 30-35
    (B) 15-20
    (C) 65-70
    (D) 85-90

8. Base suspension fertilizer essentially contains
    (A) 13% N2 and 43% P2O5
    (B) 43% N2 and 13% P2O5
    (C) 43% N2 and 13% K2O
    (D) 43% K2O and 43% P2O5

9. Dehydration of ammonium carbamate produces
    (A) Urea
    (B) Biuret
    (C) Ammonia water
    (D) None of these

10. The main constituent of rock phosphate is
    (A) Mono-calcium phosphate
    (B) Di-calcium phosphate
    (C) Fluorspar
    (D) None of these

11. Calcium ammonium nitrate (CAN) is
    (A) A mixed fertilizer
    (B) A straight fertilizer
    (C) A complex fertilizer
    (D) Not a fertilizer; it is an explosive

12. Potassic fertilizers do not promote the development of
    (A) Stems & leaves during early stage of plant growth
    (B) Starches of potatoes & grains
    (C) Sugar of fruits & vegetables
    (D) Fibrous materials of plants

13. NPK means a __________ fertilizer.
    (A) Mixed
    (B) Potassic
    (C) Liquid
    (D) Solid

14. Heating of ortho-phosphoric acid to 250°C produces
    (A) Meta-phosphoric acid
    (B) Pyrophosphoric acid
    (C) No change in it
    (D) None of these

15. Ammonium nitrate (is mixed with limestone) is not used as fertilizer as such, because
    (A) It is hygroscopic and explosive in nature
    (B) It is highly acidic in nature
    (C) It is a liquid at room temperature
    (D) Its nitrogen content is very less

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