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25 April, 04:33

Which type of reaction occurs in the following?

2HgO (s) - - 2Hg (l) + O2 (g)

1. a decomposition reaction in which a metal is reduced

2. an acid-base neutralization reaction to produce oxygen gas a displacement

3. reaction involving two metals a combustion

4. reaction involving burning a metal in oxygen

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Answers (2)
  1. 25 April, 04:54
    0
    1. a decomposition reaction in which a metal ion is reduced
  2. 25 April, 04:56
    0
    1. A decomposition reaction in which a metal ion is reduced

    Explanation:

    In a decomposition reaction, a single compound is converted into two or more simpler substances.

    In this reaction, the oxidation number of Hg decreases from + 2 in HgO to 0 in Hg (reduction), so the mercury ion is reduced.

    2 is wrong. There are no acids or bases on the reactant side of the equation.

    3 is wrong. There are no metals on the reactant side of the equation.

    4 is wrong. There is no oxygen on the reactant side of the equation.
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