8. Brisk effervescence produced when a pinch of sodium carbonate is
added to acetic acid is due to the formation of
O Hydrogen gas
O Carbon dioxide gas
O Carbon monoxide gas
O
Methane Gas
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Explanation:
option a and b is correct
When acetic acid reacts with sodium hydrogen carbonate, CO
2
is released with brisk effervescence.
The presence of CO
2
can be checked by passing the gas through lime water which turns milky on reacting with CO
2
thus indicating its presence.
NaHCO
3
+CH
3
COOH→CH
3
COONa+H
2
O+CO
2
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