Chemical Reaction Engineering - Study Mode

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[#286] An isothermal aqueous phase reversible reaction, P ⇋ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m 3 .h is given by, r = 0.5C P - 0.125C R . A stream containing only P enters the

(A) 0.80

(B) 1.33

(C) 1.60

(D) 2.67

Correct Answer

(C) 1.60

[#287] The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to

(A) d

(B) $$sqrt { ext{d}} $$

(C) d 1.5

(D) d 2

Correct Answer

(A) d

[#288] Which of the following is not a unit of reaction rate?

(A) Moles for med/(surface of catalyst) (time)

(B) Moles formed/volume of reactor) (time)

(C) Mole formed/volume of catalyst) (time)

(D) None of these

Correct Answer

(D) None of these

[#289] Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.

(A) Proportional to

(B) Independent of

(C) Inversely proportional to

(D) Proportional to the square of

Correct Answer

(A) Proportional to

[#290] Conversion increases with increase in temperature in case of a an __________ reaction.

(A) Autocatalytic

(B) Irreversible

(C) Reversible endothermic

(D) Reversible exothermic

Correct Answer

(C) Reversible endothermic