MCQ
Which of the following is neutral oxide ?
- A$SnO$
- B$PbO$
- C$PbO_2$
- ✓$N_2O$
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(Given: Atomic no. $Eu, 63; Sm , 62 ; Tm , 69 ; Tb$, $65 ; Yb , 70 ; Dy , 66]$
