When Pentan-3-one reacts with hydrazine (H$_2$N-NH$_2$), it forms a hydrazone derivative. Upon further heating with KOH in ethylene glycol, it undergoes the Wolff-Kishner reduction, leading to the complete removal of the carbonyl oxygen and yielding n-pentane.
Ethanal to But-2-enal
The correct IUPAC name of \([ \text{Pt}(\text{NH}_3)_2\text{Cl}_2 ]^{2+} \) is: