# 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? with Answer - Chemical Engineering Mcqs | TestPrep

> Solved MCQ: 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? Correct Answer: B. Diffusion through ash layer. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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# 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?

Direct Answer & Quick Reference

The correct option is **B. Diffusion through ash layer**.

A. Film diffusion

B. Diffusion through ash layer **(Correct Answer)**

C. Chemical reaction

D. Either A., B. or C.

✨ Explain with AI

Verified Key: B. Diffusion through ash layer
Solved by 3,085+ students

Verified against official examination board answer keys and standard curriculum textbooks.

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