MCQ
Which will form lactone on treatment with $NaOH$ ?
- A$\alpha -$ Bromo acid
- B$\beta -$ Bromo acid
- C$\beta -$ Hydroxy acid
- ✓$\delta -$ Bromo acid
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Reason : Oxidation state of $Cl$ in $HClO_4$ is $+7$ and in $HClO_3$, it is $+ 5$.
Product $(A)$ is