name the gas evolved when dilute hcl reacts with sodium hyrogencarbonate and how it is recoganised
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When dilute hydrochloric acid reacts with sodium hydrogen carbonate, Carbon dioxide gas is liberated .We recognize the presence of carbon dioxide by passing it through lime water which turns milky or a white precipitate of calcium carbonate is formed. ... So the acid or base becomes dilute.
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Carbon dioxide gas is evolved and we can recognise it by taking a burning candle near it and the candle blow out
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