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NEETChemistryp Block Elements (Group 15, 16, 17 & 18)

Which substance is used as a standard solution for titration in the quantitative estimation of O 3 gas?

Options

  1. ASodium hydroxide
  2. BHydrochloric acid
  3. CSodium thiosulphate
  4. DBorate buffer

Correct answer

C. Sodium thiosulphate

Step-by-step solution

In the quantitative estimation of O 3 gas, iodine liberated when ozone reacts with an excess of potassium iodide solution buffered with a borate buffer is titrated against a standard solution of sodium thiosulphate. This method provides a quantitative estimation of ozone.

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