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Assertion (A): A chlor alkali plant cannot adjust its caustic to chlorine ratio to suit the market.
Reason (R): Both are produced by the same electrolysis in a ratio set by the stoichiometry.

  • 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 is the cause. The electrolysis produces one mole of chlorine for every two of caustic soda, and no operating change alters that ratio - it is fixed by the chemistry. The industry therefore lives with a structural problem: demand for the two products moves independently, so one is often in surplus while the other is short, and the plant can only respond by changing its total rate.

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