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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________?
A Osmotic pressure of the soil water becomes less than that of the plant sap
B Soil becomes too alkaline
C Osmotic pressure of the soil water becomes higher than that of the plant sap
D Soil becomes too acidic
Correct Answer: Osmotic pressure of the soil water becomes higher than that of the plant sap
During conversion of ammonium carbamate into urea, presence of large excess of water______________?
A Increases the yield of urea
B Adversely affects the yield of urea
C Reduces the evaporator load by diluting the urea solution
D Does not affect the yield of urea
Correct Answer: Adversely affects the yield of urea
Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa) ?
A Use coal for heating purpose
B Gasify coal to get hydrogen from coal gas
C Use coal as filler in fertiliser
D Use coal as conditioner in fertiliser
Correct Answer: Gasify coal to get hydrogen from coal gas
Temperature and pressure in urea autoclave is_________________?
A 120°C and 300 atm
B 190°C and 200 atm
C 400°C and 550 atm
D 200°C and 10 atm
Correct Answer: 190°C and 200 atm
_____________ is the undesirable by-product produced in the manufacture of urea ?
A Ammonium carbonate
B Biuret
C Carbon dioxide
D Ammonium carbamate
Correct Answer: Biuret
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
Correct Answer: Potassium sulphate
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
Correct Answer: Biuret formation
Which nutrient in fertiliser makes the plant stems stronger and increases branching ?
A Nitrogen
B Phosphorous
C Potassium
D Calcium
Correct Answer: Phosphorous
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
Correct Answer: Absence of air
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
Correct Answer: 3-4
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