Chemical Engineering · all questions

Chemical Reaction Engineering
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446

Questions

20/23

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Q381

A batch reactor suffers from following disadvantage.

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Q382

The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the

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Q383

In a zero order reaction, reactants concentration does not change with time and the

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Q384

Pick out the wrong statement.

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Q385

A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as

\frac{7}{8}

. Which of the following statement is true?

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Q386

For series reaction, the relative yield

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Q387

In a reversible reaction, a catalyst increases the rate of forward reaction

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Q388

Shift conversion reaction

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Q389

The following gas phase reactions are carried out isothermally in a CSTR.
A → 2R; r₁ = k₁p_A;
k₁ = 20 mole/(sec.m³.bar)
A → 3S; r₂ = k₂p_A;
k₂ = 40 mole/(sec.m³.bar)
What is the maximum possible value of F_R (mole/sec)?

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Q390

When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is

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Q391

Pick out the wrong statement.

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Q392

The effectiveness factor for large value of Thiele modulus

L K / D_{1}

of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D₁ = diffusion co-efficient, cm²/second)

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Q393

The performance equations for constant density systems are identical for

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Q394

During manufacture of H₂SO₄, the oxidation of SO₂ to SO₃ by oxygen is an en-dothermic reaction. The yield of SO₃ will be maximised, if the

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Q395

__________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction.

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Q396

Space time in flow reactor is

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Q397

Space velocity

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Q398

The residence time distribution of an ideal CSTR is

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Q399

To maximise the formation of R in the simultaneous reaction
A + B → R , r_R = 2C_A^0.5.C_B²
A + B → S , r_S = 1.5 C_A.C_B
We should have

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Q400

The rate constant of a reaction depends on the

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