CBSE Class 10 Science 2023 Delhi Set 1

Question : 1 of 39

Marks: +1, -0

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

Solution:

Test tube B :

{\NaHCO}_3( {\ s})+ {\HCl}( {\aq}) → {\NaCl}( {\aq}) + {\H}_2 {\O}( {\l})+ {\CO}_2( {\g})

On passing the carbon dioxide gas evolved through lime water.

{ {\Ca}( {\OH})_2( {\aq})}↙{\text "(Lime water)"}+ {\CO}_2( {\g}) →{ {\CaCO}_3( {\ s})+ {\H}_2 {\O}( {\l})}↙{\text "(White precipitate)"}

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