railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry

In the reaction MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 :

1
MnO2 is reduced to MnCl2
2
MnO2 is oxidized to MnCl2
3
MnCl2 is reduced to MnO2
4
Mn does not undergo redox reaction
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