Question

Mno2+4Hcl =Mncl2+2H2o+cl2 in the above equation ; name the compound which are oxidized and which are reduced ?

Answer 1

Just look at the change in oxidation number, in case of oxidation there will be rise in oxidation number and vise versa.

Reactant                                              Product
Mn = +4                                               Mn = +2
O = -2                                                  Cl = -1   ( in MnCl₂)
H= +1                                                   H= +1
Cl = -1                                                  O = -2
                                                             Cl = 0 ( in Cl₂)

So, HCl is oxidized to Cl₂ and MnO₂ is reduced to MnCl₂