Question

The gas released when $NaHC{O}_3$ reacts with $HN{O}_3$ will:

• A. turn lime water milky
• B. release effervescence
• C. Both $A$ and $B$
• D. burn with a pop sound

Answer 1

Answer: (C)

Both $A$ and $B$

On reacting hydrogen carbonate with acid, an effervescence in the form of carbon dioxide gas is released along with the formation of water and salt.
$NaHC{O}_3+HN{O}_3\to NaN{O}_3+H_{2}O+C{O}_2$

$C{O}_2$ reacts with limewater to form calcium carbonate which gives it a milky appearance.

$C{O}_2\left(g\right)+Ca(OH{)}_2\to CaC{O}_3+H_{2}O$

Additionally, carbon dioxide does burn with oxygen to produce a pop sound.

So, option C is correct.