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The Solvay process manufactures

  • A.sodium metal from the molten salt
  • B.soda ash from brine and limestone
  • C.caustic soda by direct electrolysis
  • D.chlorine from hydrochloric acid

Answer: B

Ammonia is recovered and recycled, so the net raw materials are salt and limestone. Calcium chloride is the by-product and its disposal is the main environmental difficulty of the process. Salt and limestone are the net raw materials.

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