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UPSC Chemistry Environmental Chemistry / पर्यावरणीय रसायन Question Bank Environmental Chemistry

  • question_answer
          Which of the following chemicals is used in foam fire extinguishers? [NDA]

    A) Aluminium sulphate         

    B) Copper sulphate

    C) Cobalt sulphate   

    D)          Nickel sulphate

    Correct Answer: A

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