MCl4heat−−→Zn Purple colour compound (Colourless (A) liquid) M= Transition metal ↓Moist air (B) White fumes Identify (A), (B) and MCl4. Also explain colour difference between MCl4 and (A).
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Solution
TiCl4heat−−→ZnTiCl3−−→H2O[Ti(H2O)6]Cl3 Purple color (A) TiCl4+(n+2)H2O (moist air)⟶TiO2(H2O)n+4HCl↑ white fumes (B) Ti4+=[Ar]3d° Ti3+=[Ar]3d1 Ti (+IV) ion contains no d-electron, while d-d-transition of single electron in Ti (+III) causes color change.