GATE BT concept:effectiveness-factor PYQs & Answers

Questions 1–2 of 2. Imported answers require independent review unless marked reviewed.

An enzyme immobilised in a porous spherical pellet, catalyses a strong mass-transfer limited first-order reaction. The effectiveness factor for the immobilised enzyme reaction increases with the

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decrease in the size of the pellet

increase in the pore diffusivity within the pellet

decrease in the enzyme turnover number

increase in the enzyme concentration within the pellet

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Which of the following statements are CORRECT for an enzyme entrapped in a spherical particle?

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Effectiveness factor is ratio of the reaction rate with diffusion-limitation to the reaction rate without diffusion-limitation

Internal diffusion is rate-limiting at low values of Thiele modulus

Effectiveness factor increases with decrease in Thiele modulus

Internal diffusion-limitation can be reduced by decreasing the size of the particle

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GATE BT concept:effectiveness-factor PYQs

How to practice concept:effectiveness-factor

Question 54

Question 48