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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

According to Raoult’s law, “The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component.” Raoult’s law is not applicable under the following assumption/condition?
A No component is concentrated at the surface of the solution
B The component molecules are non polar and are of almost equal size
C In the formation of solution, chemical combination/molecular association between unlike
D The attractive forces between like and unlike molecules are almost equal
Correct Answer: In the formation of solution, chemical combination/molecular association between unlike
The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be______________?
A Basic
B More acidic
C Neutral
D Of the same acidity
Correct Answer: Basic
In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the________________?
A Total pressure
B Absolute humidity at a given temperature
C Both A. and B.
D Neither A. nor B.
Correct Answer: Both A. and B.
1 gm mole of methane (CH4) contains_________________?
A 6.02 × 1023 atoms of hydrogen
B 4 gm atoms of hydrogen
C 3.01 × 1023 molecules of methane
D 3 gms of carbon
Correct Answer: 4 gm atoms of hydrogen
If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?
A 10
B 100
C 1000
D 10000
Correct Answer: 10
The equilibria relations in a multi-component and multiphase system cannot be calculated with the help of the_______________?
A Phase rule
B Experimental data
C Empirical equations
D Theoretical equations
Correct Answer: Phase rule
Solutions which distil without change in composition are called________________?
A Ideal
B Saturated
C Supersaturated
D Azeotropic
Correct Answer: Azeotropic
In osmosis through a semi-permeable membrane, diffusion of the___________________?
A Solvent is from low concentration to high concentration region
B Solvent is from high concentration to low concentration region
C Solute takes place
D None of these
Correct Answer: Solvent is from low concentration to high concentration region
Cp is expressed in S.I. unit as_______________?
A J/kg.°K
B 0°K
C W/m2.°C
D W/m.°K
Correct Answer: J/kg.°K
Increasing the temperature of an aqueous solution will cause decrease in its________________?
A Molality
B Mole fraction
C Weight percent
D Molarity
Correct Answer: Molarity
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