MCQ
What acts as a reducing agent when dry cell is working?
- AGraphite
- BMnO2
- CNH4Cl
- ✓Zn
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$(i)$ Manganese exhibits $+7$ oxidation state in its oxide.
$(ii)$ Ruthenium and Osmium exhibit $+8$ oxidation in their oxides.
$(iii)$ $Sc$ shows $+4$ oxidation state which is oxidizing in nature.
$(iv)$ $Cr$ shows oxidising nature in $+6$ oxidation state.
