Question

In heterogeneous reaction, if a reaction proceeds slowly even in the presence of adequate substrate then mass transfer will be?

(a) Slow

(b) Very slow

(c) Rapid

(d) Negligible

The question was asked in an online quiz.

This question is from Concentration Gradients and Reaction Rates in Solid Catalysts topic in division Heterogenous Reactions of Bioprocess Engineering

Answer 1

Correct option is (c) Rapid

To explain I would say: If a reaction proceeds slowly even in the presence of adequate substrate, it is likely that mass transfer will be rapid enough to meet the reaction demand. In this case, the observed rate would be determined more directly by the reaction process than mass transfer. Conversely, if the reaction tends to be very rapid, it is likely that mass transfer will be too slow to supply substrate at the rate required.