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Match each tracer experiment or curve with what it gives.
List I
A. Pulse injection
B. Step change
C. E curve
D. F curve
List II
1. the fraction leaving between two times
2. the E curve directly
3. the fraction leaving before a given time
4. the F curve directly

  • A.A-4, B-2, C-1, D-3
  • B.A-2, B-4, C-3, D-1
  • C.A-3, B-1, C-4, D-2
  • D.A-2, B-4, C-1, D-3

Answer: D

The two experiments are equivalent in principle and the choice is practical. A step is easier to carry out while a pulse gives the curve of interest directly. The two carry the same information. The choice between them is practical.

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