Excess of carbon dioxide is passed through 50mL of 0.5M calcium hydroxide solution.After the completion of the reaction,the solution was evaporate was evaporated to dryness. Tha solid calcium carbonate was completely neutralised with 0.1N hydrochloric acid. The volume of hydrochloric acid required is? (Atomic mass if calcium=40)
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it is correct in up of the following
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