Chemical Engineering MCQs

6108 MCQs  (Page 504 of 611)

Attempt Chemical Engineering Quiz
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
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Naphtha in a fertiliser plant is used as a source of___________________?
A. Fuel
B. H2
C. N2
D. O2
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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
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Phosphatic fertiliser is graded based on its _____________ content?
A. P2o3
B. Pcl5
C. P2o5
D. H3po4
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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
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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
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Reaction of ______________ acid with phosphate rock produces superphosphates?
A. Hydrochloric
B. Sulphuric
C. Nitric
D. Phosphoric
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HPO3 is the chemical formula of ______________ phosphoric acid?
A. Pyro
B. Ortho
C. Meta
D. None of these
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(CH3 C6 H4)3 PO4 is the chemical formula of__________________?
A. Triple superphosphate
B. Tricresyl phosphate
C. Fluorapatite
D. Superphosphate
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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
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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