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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

In sewage treatment, its sedimentation is speeded up by commonly adding__________________?
A Hydrochloric acid
B Lime
C Copper sulphate
D Sodium sulphate
Correct Answer: Lime
What are the methods of treatment & disposal of radioactive wastes ?
A Evaporation & chemical precipitation
B Biological methods & adsorption in ion exchange materials
C Fixing into a solid mass with cement and sinking deep in the sea
D All A., B. & C.
Correct Answer: All A., B. & C.
Nitrogen oxides (NOx) is not produced in the ______________ industry?
A Nitric acid making
B Nitrogenous fertiliser
C Detergent
D Any of these
Correct Answer: Detergent
Maximum allowable concentration of CO2 in air for safe working is _____________ ppm (parts per million)?
A 50
B 1000
C 2000
D 5000
Correct Answer: 50
____________ substances present in sewage are removed in grit chamber during sewage treatment?
A Organic
B Fatty
C Inorganic
D Dissolved
Correct Answer: Inorganic
What is the ratio of adiabatic compressibility to isothermal compressibility ?
A 1
B < 1
C > 1
D >> 1
Correct Answer: 1
Air enters an adiabatic compressor at 300K. The exit temperature for a compression ratio of 3, assuming air to be an ideal gas (Y = Cp/Cv = 7/5) and the process to be reversible, is___________________?
A 300 × (32/7)
B 300 × (33/5)
C 300 × (333/7)
D 300 × (35/7)
Correct Answer: 300 × (32/7)
The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are ?
A 1
B 2
C 3
D 0
Correct Answer: 2
A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yi is the liquid activity coefficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of ______________________?
A Temperature only
B Temperature and pressure only
C Temperature, pressure and liquid composition xi only
D Temperature, pressure, liquid composition xi and vapour composition yi
Correct Answer: Temperature, pressure and liquid composition xi only
Gibbs-Duhem equation relates composition in liquid phase and the _____________ at constant temperature & pressure?
A Fugacity
B Partial pressure
C Activity co-efficient
D All (A), (B), and (C)
Correct Answer: All (A), (B), and (C)
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