MCQ
Arrange their stabilities of given gem - dials in decreasing order.


- ✓$I > II > III$
- B$III > II > I$
- C$I > III > II$
- D$III > I > II$

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$Pb \left( NO _{3}\right)_{2} \stackrel{673 K }{\longrightarrow} A + PbO + O _{2}$
$A \stackrel{\text { Dimerise }}{\longrightarrow} B$
