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Hydrogen may be used for all but one of the following

  • A

    Synthesis of ammomia

  • B

    hydrogenation of oil

  • C

    manufacture of methanol

  • D

    synthesis of zinc

synthesis of zinc Is the correct option, Check your your study materials for clarification. In responding to the question with the right answer : Hydrogen may be used for all but one of the following(looking at your study materia, the answer is) synthesis of zinc