NEET Chemistry The p-Block Elements (XII) Questions Solved

NEET - 2013

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 isolated. The gas X is

(a) H2S

(b) SO2

(c) CO2

(d) SO3

(b) SO2 gas is obtained when any sulphide ore is roasted.

2M2S + 3O2 2M2O + 2SO2

This gas exhibits all the characteristics given in the question.

Difficulty Level:

  • 13%
  • 73%
  • 7%
  • 10%
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