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Consider the following statements about a graphical solution for a cascade.
1. The rate curve and the operating line intersect at each stage exit.
2. The construction steps between the curve and the line.
3. It can only be used when the rate law is first order.

  • A.3 only
  • B.1 only
  • C.All of them
  • D.1 and 2 only

Answer: D

The first two are correct and describe the standard construction. The third is wrong, since the method works for any rate curve and is particularly useful where no analytical solution exists. Measured rate data can be used directly.

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