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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

A catalyst loses its activity due to__________________?
A Loss in surface area of the active component
B Agglomeration of metal particles caused by thermal sintering of the solid surface
C Covering of the catalytic active sites by a foreign substance
D All A., B. and C.
Correct Answer: All A., B. and C.
Transition state theory relates the above quantities as___________________?
A k ∝ e-E/RT
B k ∝ T.eE/RT
C k ∝ √T
D k ∝ T1.5
Correct Answer: k ∝ T.eE/RT
The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is______________________?
A 0
B 1
C 2
D 3
Correct Answer: 2
Second order consecutive irreversible reaction as shown in the bellow figure, were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (k1/k2) ?
A 1/4
B 1/2
C 2
D 4
Correct Answer: 1/4
The fractional volume change of the system for the isothermal gas phase reaction, A → 3B, between no conversion and complete conversion is___________________?
A 0.5
B 1
C 2
D 3
Correct Answer: 2
For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of ‘P’ is doubled. If the reaction rate is proportional to Cp n, then what is the value of ‘n’ for this chemical reaction ?
A 0
B 1
C 2
D 3
Correct Answer: 1
The rate constant of a chemical reaction decreases by decreasing the____________________?
A Pressure
B Concentration of reactants
C Temperature
D Duration of reaction
Correct Answer: Temperature
If CA is the quantity of reactants initially present, the quantity left after ‘n’ half periods will be equal to__________________?
A (CA/2)n
B (½)n CA
C (CA/2)1/n
D (CA)1/2n
Correct Answer: (½)n CA
In an exothermic chemical reaction, the reactants compared to the products have__________________?
A Higher temperature
B More energy
C Less energy
D Same energy
Correct Answer: More energy
BET apparatus_______________________?
A Measures the catalyst surface area directly
B Operates at very high pressure
C Is made entirely of stainless steel
D None of these
Correct Answer: None of these
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