MCQ
Transition elements are usually characterised by variable oxidation states but $Zn$ does not show this property because of
- Acompletion of $np-$ orbitals
- ✓completion of $(n-1)d$ orbitals
- Ccompletion of $ns-$ orbitals
- Dinert pair effect
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$NH_4NO_3(s) \rightarrow N_2O(g) + 2H_2O(l)$
$PC{l_5}(g) \rightleftharpoons PC{l_3}(g) + C{l_2}(g)$ is