MCQ
Which of the following ions is paramagnetic
- A$C{u^ + }$
- B$Z{n^{ + 2}}$
- ✓$T{i^{ + 3}}$
- D$T{i^{ + 4}}$

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Reason : Oxidation state of $Cl$ in $HClO_4$ is $+7$ and in $HClO_3$, it is $+ 5$.
