Number of volums of `O_(2)` formed when 3 volumes of Ozone decomposes

Number of volums of `O_(2)` formed when 3 volumes of Ozone decomposes
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Number of volums of `O_(2)` formed when 3 volumes of Ozone decomposes A. 2 B. `4.5` C. 6 D. `1.5`
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