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Name the gas evolved when dilute HCl rea...

Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?

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`CO_2` gas is evolved . The reaction is as follows :
`underset("hydrogencarbonate")underset("Sodium")(NaHCO_3(s))+underset("chloride")underset("Hydrogen")(HCl(aq))rarrunderset("chloride")underset("Sodium")(NaCl(aq))+underset("Water")(H_(2)O(l))+underset("dioxide")underset("Carbon")(CO_2)uarr`
When the produced gas is passed through lime water , lime water milky which confirms that the evolved gas is `CO_2` .
`underset(("Lime water"))underset("Calcium hydroxide")(Ca(OH)_(2)(aq))+CO_(2)(g) rarrunderset("Precipitate")underset("White")(CaCO_(3)(s))+H_(2)O(l)`
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