Choose the INCORRECT statement about SO_2. | vedclass

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(A) $1$. $SO_2$ is a non-combustible gas and does not support combustion,so option $A$ is incorrect.$2$. The maximum permitted atmospheric concentrati

Vedclass · Accepted Answer

$SO_2$ cannot burn but supports combustion.

Vedclass · Answer

(A) $1$. $SO_2$ is a non-combustible gas and does not support combustion,so option $A$ is incorrect.$2$. The maximum permitted atmospheric concentration of $SO_2$ for humans is indeed $5 \ ppm$.$3$. In the contact process,$SO_2$ is oxidized to $SO_3$ using $V_2O_5$ as a catalyst at high temperature (around $720 \ K$) and low pressure (around $2 \ bar$),not low temperature and high pressure.$4$. $SO_2$ has sulfur in the $+4$ oxidation state,which can be oxidized to $+6$ or reduced to $0$,thus it acts as both an oxidizing and reducing agent.$5$. Both $A$ and $C$ are technically incorrect statements based on standard chemical properties and industrial processes.

Choose the $INCORRECT$ statement about $SO_2$.

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