When air is passed through potash and then pyrogallol, the components are noble gases,

When air is passed through potash and then pyrogallol, the components are noble gases,
  • A.
    oxygen and carbon (IV) oxide
  • B.
    oxygen and nitrogen
  • C.
    nitrogen and water vapour
  • D.
    water vapour and carbon (IV) oxide
  • E.
    oxygen and water vapour
Correct Answer: Option C
Explanation
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