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None of the following is a green chemistry metric except

  • A.the viscosity index
  • B.process mass intensity
  • C.the pyrometric cone equivalent
  • D.the saponification value

Answer: B

Correct answer: process mass intensity

Process mass intensity is a green chemistry metric, the total mass of material input per unit mass of product, and it sits alongside atom economy, the E-factor and reaction mass efficiency. The other three are ordinary analytical or materials measurements - of lubricating oil, of refractories and of fats respectively.

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