Out of the following, copper vessels are the most suitable for the storage of__________________?

Correct answer: B. Dry chlorine & dry fluorine

  • A. Bromine
  • B. Dry chlorine & dry fluorine
  • C. Nitric acid (95% and fuming)
  • D. Phosphoric acid (95%) & sulphuric acid (95% and fuming)

Explanation

Copper is suitable for dry chlorine and dry fluorine because the absence of moisture greatly reduces their corrosive attack and protective surface films can form. Moist halogens and concentrated nitric or sulphuric acids are much more aggressive toward copper.

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