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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
          If a limestone piece is dipped in water, a bubble evolves. The bubbling is due to [CDS]

    A) hydrogen         

    B)                  oxygen

    C) water vapour      

    D)        carbon dioxide

    Correct Answer: D

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