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प्रश्न
Give reasons for the following. Give the chemical equation wherever required.
The milkiness of lime water disappears on adding CO2 in excess.
रासायनिक समीकरणे/रचना
कारण सांगा
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उत्तर
When excess carbon dioxide is passed through lime water, the insoluble milky calcium carbonate reacts with water and CO2 to form soluble calcium hydrogen carbonate.
\[ \text{CaCO}_3\text{ (s)} + \text{H}_2\text{O}\text{ (l)} + \text{CO}_2\text{ (g)} \longrightarrow \text{Ca(HCO}_3\text{)}_2\text{ (aq)} \]
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