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Chlorine gas is prepared in the laboratory by

Chemistry
JAMB 2003

Chlorine gas is prepared in the laboratory by

  • A. adding concentrated hydrochloric acid to solid manganese (IV) oxide
  • B. aciding concentrated tetraoxosulphate (VI) acid to solid sodium chloride
  • C. dropping concentrated hydrochloric acid onto potassium tetraoxomanganate (VI) crystals
  • D. aciding concentrated tetraoxosulphate (VI) acid to hydrochloric acid
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Correct Answer: Option A
Explanation

Chlorine gas is prepared in the laboratory by adding an oxidizing agent e.g. \(MnO_2\), \(PbO_2\), or \(KMnO_4\) on concentrated hydrochloric acid.

\(MnO_{2(s)}\) + 4\(HCl_{aq}\)  → \(MnO_{2(aq)}\) + 2\(H_2O_{(l)}\) + \(Cl_{2(g)}\)

 

There is an explanation video available below.

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Explanation Video

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