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UPSC Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Elements Classification and Chemical Bonding

  • question_answer
          Most of the explosions in mines occur due to the mixing of [IAS Prelim]

    A) hydrogen with oxygen

    B) oxygen with acetylene

    C) methane with air

    D) carbon dioxide with ethane

    Correct Answer: B

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