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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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.

What is the maximum possible value of FR(mole/sec.) ?

A 1/3

B 1/2

C 2/3

D 2

Review Detailed Answer

Correct Answer: 2/3

A second order reaction of the form A + B → C is called a pseudo-first order reaction, when____________________?

A CA0 = CB0

B CA0 > CB0

C CB0 > CA0

D CB0 ≥ CB0

Review Detailed Answer

Correct Answer: CB0 ≥ CB0

Pure A in gas phase enters a reactor 50% of this A is converted to B through the reaction, A → 3B. Mole fraction of A in the exit stream is______________________?

A 1/2

B 1/3

C 1/4

D 1/5

Review Detailed Answer

Correct Answer: 1/3

A chemical reaction occurs when the energy of the reacting molecules is __________________ the activation energy of the reaction?

A Less than

B Equal to

C More than

D Equal to or more than

Review Detailed Answer

Correct Answer: Equal to

For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the _______________ is the controlling resistance?

A Film diffusion

B Diffusion through ash layer

C Chemical reaction

D Either A., B. or C.

Review Detailed Answer

Correct Answer: Diffusion through ash layer

A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by________________?

A keff = k + kg

B keff = (k+ kg)/2

C keff = (kkg)1/2

D 1/keff = 1/k + 1/kg

Review Detailed Answer

Correct Answer: 1/keff = 1/k + 1/kg

Decomposition rate of a liquid ‘X’ which decomposes as per the reaction as shown in the bellow figure is given by________________?

A K1 . CX

B (K1 + K2 + K3) CX

C (K1 + K2) CX

D (K2 + K3) CX

Review Detailed Answer

Correct Answer: (K1 + K2) CX

The sequence in which three CSTR’s of volumes 5, 10 and 15 m3 will be connected in series to obtain the maximum production in a second order irreversible reaction is ____________________?

A 15, 10, 5

B 5, 10, 15

C 10, 5, 15

D 10, 15, 5

Review Detailed Answer

Correct Answer: 15, 10, 5

Given, 3H2 + CO = CH4 + H2O, KP = 101.84 and, 4H2 + CO2 = CH4 + 2H2O, KP = 101.17 the KP for the reaction CO + H2O = CO2 + H2 is __________________?

A 103.01

B 10-0.67

C 10-3.01

D 100.67

Review Detailed Answer

Correct Answer: 100.67

Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2/sec.D1 = diffusion co-efficient; cm2/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm3/sec. V = volume, cm3.) ?

A Reactor dispersion number (D/vL)

B Reduced time (vt/V)

C Thiele modulus L √(k/D1)

D None of these

Review Detailed Answer

Correct Answer: None of these

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

What is the maximum possible value of FR(mole/sec.) ?

A second order reaction of the form A + B → C is called a pseudo-first order reaction, when____________________?

Pure A in gas phase enters a reactor 50% of this A is converted to B through the reaction, A → 3B. Mole fraction of A in the exit stream is______________________?

A chemical reaction occurs when the energy of the reacting molecules is __________________ the activation energy of the reaction?

For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the _______________ is the controlling resistance?

A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by________________?

Decomposition rate of a liquid ‘X’ which decomposes as per the reaction as shown in the bellow figure is given by________________?

The sequence in which three CSTR’s of volumes 5, 10 and 15 m3 will be connected in series to obtain the maximum production in a second order irreversible reaction is ____________________?

Given, 3H2 + CO = CH4 + H2O, KP = 101.84 and, 4H2 + CO2 = CH4 + 2H2O, KP = 101.17 the KP for the reaction CO + H2O = CO2 + H2 is __________________?

Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2/sec.D1 = diffusion co-efficient; cm2/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm3/sec. V = volume, cm3.) ?