Which one is the anhydride of `HClO_4` ?
Which one is the anhydride of `HClO_4` ?
A. `Cl_2O`
B. `ClO_2`
C. `Cl_2O_6`
D. `Cl_2O_7`
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Correct Answer - D
`2 HClO_4 to H_2O + Cl_2O_7`
Thus, `Cl_2O_7` is anhydride of `HClO_4`
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