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Pyrogallol is
A. `1,2,3`-trihydroxybenzene
B. `1,2,4`-trihydroxybenzene
C. `1,3,5`-trihydroxybenzene
D. `2,4,6`-trihydroxybenzene

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Correct Answer - A
It is a trihydric phenol
image
Alkaline solutions of pyrogallol oxidized very rapidly on exposure to air and hence are used in gas analysis for the absorption of oxygen (and carbon dioxide).

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