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During determination of alkalinity of given water sample, the alkaline water sample does not turn pink on addition of phenolphthalein i.e. P = 0, the

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During determination of alkalinity of given water sample, the alkaline water sample does not turn pink on addition of phenolphthalein i.e. P = 0, the observation suggests the presence of O a OH and CO32- O b. HCO3 only Oc. CO32- only Od. OH only

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