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what occurs during the reaction below

4Hcl+MnO2-->MnCl2+2H2O+Cl2
1.the manganese is reduced and its oxidation number changes from +4 to +2.
2.the manganese is oxidized and its oxidation number changes from +4 to +2.
3.the manganese is reduced and its oxidation number changes from +2 to +4.
4. the manganese is oxidized and its oxidation number changes from +2 to +4.
dont understand please help

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3 answers
  1. I hardly now how to help without giving you the answer.
    Remember the definitions.
    Loss of electrons is oxidn.
    Gain of electrons is redn.
    So for #1, does Mn go from +4 to +2? and Is that an oxidn or a redn. Do the other possibilities the same way.

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  2. answer is 1

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  3. i also agree

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