CBSE Class 10 Science 2023 Delhi Set 1

Question : 1

Total: 39

When sodium bicarbonate reacts with dilute hydrochloric acid, the gas evolved is:

Solution:

Test tube B :

NaHCO3( s)+HCl(aq)→NaCl(aq)+H2O(l)+CO2(g)

On passing the carbon dioxide gas evolved through lime water.

Ca(OH)2(aq)

(Lime water)

+CO2(g)→

CaCO3( s)+H2O(l)

(White precipitate)

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