MCQ
Which of the following is acidic oxide?
- AMnO
- B$Mn _2 O _3$
- C$MnO _2$
- ✓$Mn _2 O _7$
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$(I)\,\, AgNO_3$
$(II)\,\, CaCO_3$
$(III) \,\,Pb(NO_3)_2$
$(IV) \,\,Na_2CO_3$