Chemical Engineering MCQs

6108 MCQs  (Page 511 of 611)

Attempt Chemical Engineering Quiz
Raw materials for urea production are _________________?
A. Co2 and n2
B. Co2, h2 and n2
C. Nh3 and co
D. Hno3 and caco3
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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
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C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about_________________?
A. 2
B. 6
C. 13
D. 20
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CaH4(PO4)2 is the chemical formula of ___________________?
A. Superphosphate
B. Triple superphosphate
C. Calcium phosphate
D. Meta phosphoric acid
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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
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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 oxidising atmosphere
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Which nutrient in fertiliser makes the plant stems stronger and increases branching ?
A. Nitrogen
B. Phosphorous
C. Potassium
D. Calcium
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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
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A Potassic fertiliser contains 50% K2O. It could be _________________?
A. Potassium sulphate
B. Potassium chloride
C. A mixture of nacl + kcl
D. None of these
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_____________ is the undesirable by-product produced in the manufacture of urea ?
A. Ammonium carbonate
B. Biuret
C. Carbon dioxide
D. Ammonium carbamate
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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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