Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

  • A
    Concentrated hydrochloric acid emits strongly smelling $HCl$ gas all the time
  • B
    Oxygen in air reacts with the emitted $HCl$ gas to form a cloud of chlorine gas
  • C
    Strong affinity of $HCl$ gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke
  • D
    Due to strong affinity for water,concentrated hydrochloric acid pulls moisture of air towards itself. This moisture forms droplets of water and hence the cloud

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