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The appropriate test paper to use in the above experiment is moist

Chemistry
JAMB 1991

The appropriate test paper to use in the above experiment is moist

  • A. litmus psper
  • B. potassium heptaoxodichromate (IV) paper
  • C. lead (ll) trioxonitrate (V) paper
  • D. universal indicator paper
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Correct Answer: Option C
Explanation

Hydrogen Sulphide can easily be identified by bringing a strip of filter paper soaked in Lead(II) ethanoate solution or Lead(II) nitrate(V) solution into the gas.

H\(_2\)S turns the paper dark brown or black. The change in colour is as a result of formation of precipitate of black lead(II) Sulphide.

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