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Assertion (A): Reducing dead time is often more valuable than speeding up the reaction in a batch plant.
Reason (R): Charging, heating, cooling and cleaning can occupy more of the cycle than the reaction does.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Correct answer: Both A and R are true, and R is the correct explanation of A

Both are true and the reason gives the arithmetic. In many batch plants the reaction occupies a smaller share of the cycle than the operations around it, so halving the reaction time might gain a fifth of the cycle while shortening the heat-up or the cleaning could gain as much for less effort. The right question is always which part of the cycle is the longest, not which part is the most interesting.

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