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Discussion

Yield of a wanted product is normally defined as

  • A.the ratio of the two rate constants
  • B.moles formed over the theoretical maximum
  • C.moles formed over moles of unwanted product
  • D.moles reacted divided by the moles fed

Answer: B

It measures how much of the potential was realised, whereas selectivity compares the two products with each other. Conversion, the third option, says nothing about which product was formed. The three measures answer different questions.

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