Discussion
A catalytic reagent is preferred to a stoichiometric one because the catalyst is
Answer: B
Correct answer: used in small quantity and not consumed
A catalyst is regenerated in each cycle, so a small charge turns over many times and appears in neither the product nor the waste. A stoichiometric reagent is consumed in equimolar quantity and leaves as spent material, so its whole mass becomes waste. That difference in mass is why the principle is stated in terms of catalysis.
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