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NEET2013ChemistryGeneral Principles and Processes of Isolation of MetalsActual

Roasting of sulphides gives the gas X as a by-product. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been insolated. The gas X is

Options

  1. AH ₂ ~S
  2. BSO ₂
  3. CCO ₂
  4. DSO ₃

Correct answer

B. SO ₂

Step-by-step solution

SO ₂ gas is obtained when any sulphide ore is roasted. 2 M ₂ ~S +3 O ₂ 2 M ₂ O +2 SO ₂ This gas exhibits all the characteristics given in the question.

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