MCQ
Caro's acid is
- A$H_2SO_5$
- ✓$H_2S_2O_5$
- C$H_2S_2O_7$
- D$H_2S_2O_8$
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Phenol $\xrightarrow{{Zn\,\,dust}}X\,\xrightarrow[{Anhyd.\,AlC{l_3}}]{{C{H_3}Cl}}\,Y\xrightarrow{{Alkaline\,\,KMn{O_4}}}\,Z$
the product $Z$ is