12th Class Chemistry Sample Paper Chemistry Sample Test Paper-10

  • question_answer
      Suggest a quantitative method for the estimation of the gas which protects us from UV rays of the Sun.                                                      

    Answer:

      The gas is ozone. Ozone can be estimated quantitatively as:  gas is treated with excess of Kl solution in a buffer of pH 9.2 (borate buffer is used). Liberated  can be estimated by titration with sodium thiosulphate solution (hypo).                                                [1]


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