A. Limiting reagent
B. Excess reagent
C. Can’t say
D. None of the mentioned
I had been asked this question in unit test.
My doubt is from Stoichiometry Applications Terminology topic in chapter The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering
The explanation is: The balanced chemical reaction is 2CO + O2 -> 2CO2, => If 4 moles of CO are reacting, 2 moles of O2 will react, this means none of the two is limiting reagent or excess reagent.