Which of the following is not correct?

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(C) Silica $(SiO_2)$ is an acidic oxide and acts as an acid flux to remove basic impurities like $CaO$ or $FeO$ by forming slag.In the reaction betwee

Vedclass · Accepted Answer

$SiO_2$ reacts with $Na_2CO_3$ and liberates $CO_2$.

Vedclass · Answer

(C) Silica $(SiO_2)$ is an acidic oxide and acts as an acid flux to remove basic impurities like $CaO$ or $FeO$ by forming slag.In the reaction between $SiO_2$ and $Na_2CO_3$,$CO_2$ gas is evolved,not $CO$.The reaction is: $Na_2CO_3 + SiO_2 \rightarrow Na_2SiO_3 + CO_2 \uparrow$.Therefore,the statement in option $C$ is incorrect as it mentions the liberation of $CO$ instead of $CO_2$.

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