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  4. A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with cone. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in g ) of the remaining product at STP will be

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Q. A mixture of $2.3 \,g$ formic acid and $4.5 \,g$ oxalic acid is treated with cone. $H_2SO_4$. The evolved gaseous mixture is passed through $KOH$ pellets. Weight (in $g$ ) of the remaining product at $STP$ will be

NEETNEET 2018Some Basic Concepts of Chemistry

Solution:

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Gaseous mixture formed is $CO$ and $CO _{2}$ when it is passed through $KOH$, only $CO _{2}$ is absorbed. So the remaining gas is $CO$.

So, weight of remaining gaseous product $CO$ is

$\frac{2}{20} \times 28=2.8\, g$