Fertilizer Technology Mcqs - Chemical - Set 3

1)   ______________ is the most suitable fertiliser for paddy?

a. Urea
b. Ammonium sulphate
c. Superphosphate
d. Potassium nitrate
Answer  Explanation 

ANSWER: Ammonium sulphate

Explanation:
No explanation is available for this question!


2)   Phosphorus vapour comprises of ___________________?

a. P
b. P2
c. P3
d. P4
Answer  Explanation 

ANSWER: P4

Explanation:
No explanation is available for this question!


3)   Reaction of Cresylic acid with _____________ produces Tricresyl phosphate?

a. Phosphorous pentoxide
b. Phosphorous oxychloride
c. Ammonium phosphate
d. Calcium phosphate
Answer  Explanation 

ANSWER: Phosphorous oxychloride

Explanation:
No explanation is available for this question!


4)   Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________________?

a. Steam reforming of naphtha and cracking of natural gas
b. Electrolysis of water
c. Cryogenic separation of hydrogen from coke oven gas
d. All A., B. and C.
Answer  Explanation 

ANSWER: All A., B. and C.

Explanation:
No explanation is available for this question!


5)   Low grade phosphate rock can be used in electrical furnace, because__________________?

a. Of the better CaO/SiO2 balance for slag formation
b. CaO content is less
c. It is cheap
d. It produces low cost product
Answer  Explanation 

ANSWER: Of the better CaO/SiO2 balance for slag formation

Explanation:
No explanation is available for this question!


6)   Naphtha in a fertiliser plant is used as a source of___________________?

a. Fuel
b. H2
c. N2
d. O2
Answer  Explanation 

ANSWER: H2

Explanation:
No explanation is available for this question!


7)   Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ______________ of the catalyst ?

a. Stabilisation
b. Increasing the effectiveness
c. Improving the strength & heat resistance
d. All A, B & C
Answer  Explanation 

ANSWER: All A, B & C

Explanation:
No explanation is available for this question!


8)   Phosphatic fertiliser is graded based on its _____________ content?

a. P2O3
b. PCl5
c. P2O5
d. H3PO4
Answer  Explanation 

ANSWER: P2O5

Explanation:
No explanation is available for this question!


9)   Which of the following gasifiers can be attached to coal based fertiliser plants ?

a. Lurgi (high pressure) gasifier
b. Kopper-Totzek gasifier
c. Gasifier working at 20 atm
d. Gasifier working at 40 atm
Answer  Explanation 

ANSWER: Kopper-Totzek gasifier

Explanation:
No explanation is available for this question!


10)   Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at ____________ °C in absence of air?

a. 50-80
b. 250-400
c. 1000-1200
d. 800-900
Answer  Explanation 

ANSWER: 250-400

Explanation:
No explanation is available for this question!


11)   Reaction of ______________ acid with phosphate rock produces superphosphates?

a. Hydrochloric
b. Sulphuric
c. Nitric
d. Phosphoric
Answer  Explanation 

ANSWER: Sulphuric

Explanation:
No explanation is available for this question!


12)   HPO3 is the chemical formula of ______________ phosphoric acid?

a. Pyro
b. Ortho
c. Meta
d. None of these
Answer  Explanation 

ANSWER: Meta

Explanation:
No explanation is available for this question!


13)   (CH3 C6 H4)3 PO4 is the chemical formula of__________________?

a. Triple superphosphate
b. Tricresyl phosphate
c. Fluorapatite
d. Superphosphate
Answer  Explanation 

ANSWER: Tricresyl phosphate

Explanation:
No explanation is available for this question!


14)   During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about ______________ percent?

a. 38
b. 68
c. 82
d. 98
Answer  Explanation 

ANSWER: 98

Explanation:
No explanation is available for this question!


15)   Ammonia synthesis reaction is______________________?

a. Exothermic
b. Endothermic
c. Autocatalytic
d. None of these
Answer  Explanation 

ANSWER: Exothermic

Explanation:
No explanation is available for this question!


16)   Nitrogenous fertiliser is required__________________?

a. During the early stage of growth to promote development of stem and leaves
b. For accelerating fruit formation in later stage of growth
c. To lessen the effect of excessive potash application
d. None of these
Answer  Explanation 

ANSWER: During the early stage of growth to promote development of stem and leaves

Explanation:
No explanation is available for this question!


17)   Commercial fertilisers are available mostly in the form of__________________?

a. Powder
b. Granules
c. Lumps
d. Flakes
Answer  Explanation 

ANSWER: Granules

Explanation:
No explanation is available for this question!


18)   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?

a. Coke oven
b. Producer
c. Natural
d. Coal
Answer  Explanation 

ANSWER: Natural

Explanation:
No explanation is available for this question!


19)   Catalyst used in ammonia synthesis uses ____________ as a promoter?

a. Pt
b. K2O
c. Al2O3
d. Ni
Answer  Explanation 

ANSWER: K2O

Explanation:
No explanation is available for this question!


20)   Which is the most suitable fertiliser for paddy ?

a. CAN
b. Ammonium sulphate
c. Ammonium nitrate
d. Superphosphate
Answer  Explanation 

ANSWER: Ammonium sulphate

Explanation:
No explanation is available for this question!