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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

Reverse reaction in a chemical equilibrium is favoured by the________________?
A Removal of one of the products regularly
B Increase in the concentration of one of the products
C Increase in the concentration of one of the reactants
D None of these
Correct Answer: Increase in the concentration of one of the products
With increase in temperature, the equilibrium _______________ rises in case of endothermic reaction?
A Constant
B Conversion
C Both A. & B.
D Neither A. nor B.
Correct Answer: Conversion
What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on ?
A Litre/mole.second
B Moles/litre.second
C Litre/mole
D Litre/second
Correct Answer: Litre/mole.second
Which of the following is an autocatalytic reaction ?
A Photochemical reactions
B Microbial fermentation reaction
C Enzyme fermentation reaction
D Ammonia synthesis reaction
Correct Answer: Microbial fermentation reaction
An isothermal irreversible reaction is being carried out in an ideal tubular flow reactor. The conversion in this case will ______________ with decrease in space time?
A Increase
B Increase exponentially
C Decrease
D Remain unchanged
Correct Answer: Decrease
During manufacture of H2SO4, the oxidation of SO2 to SO3 by oxygen is an endothermic reaction. The yield of SO3 will be maximised, if the _____________________?
A Temperature is increased
B Pressure is reduced
C Temperature is increased and pressure is reduced
D Temperature is reduced and pressure is increased
Correct Answer: Temperature is reduced and pressure is increased
From Arrhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is___________________?
A k cal
B k cal/°K
C °K
D k cal. °K
Correct Answer: °K
Pick out the wrong statement ?
A For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank
B For an ideal mixed reactor at steady state, the exit stream has the same composition as fluid
C Plug flow reactor (PFR) is always smaller than mixed reactor for all positive reaction orders
D Reaction rate does not decrease appreciably as the reaction proceeds in case of an
Correct Answer: For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank
Pick out the wrong statement ?
A For the same conversion, the holding time required in a batch reactor, is always equal to the space time required in a PFR
B Two mixed reactors of unequal size are available for producing a specified product, formed by
C Arrhenius equation describing the effect of temperature on rate constant is given by,
D The mechanism for the decomposition of CH3CHO into CH4 and CO in presence of I2 is:
Correct Answer: The mechanism for the decomposition of CH3CHO into CH4 and CO in presence of I2 is:
Pick out the correct statement ?
A A chemical reaction accompanied by absorption of heat is called an exothermic reaction
B A chemical reaction accompanied by evolution of heat is called an endothermic reaction
C The rate constant for a first order reaction does not change on changing the concentration units
D Chemical equilibrium state is dynamic in nature
Correct Answer: The rate constant for a first order reaction does not change on changing the concentration units
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