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`underset(("White fumes having smell"))(B)overset("Moist air")(larr)underset("M=(Transition element colorless")(MCl_(4))overset(Zn)(rarr)underset(("Purple color"))(A)`
Identify the metal M and hence `MCl_(4)`. Explain the difference in colors of `MCl_(4)` and A.

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`underset(("White fumes having smell"))(B) overset("Moist air")(larr)underset("M=(Transition elementcolorless)")(MCl_(4))overset(Zn)(rarr)underset(("Purple Color"))(A)`
`M=Ti, MCl_(4)=TiCl_(4)`
`A=[Ti(H_(2)O)_(6)]^(3+)`
`B=TiO_(2)`
`Ti(IV)` ion contains no `d-` electron, so it is colorless
`Ti(III)` ion contains one `d-` electron, so its is colored.
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