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

Question

A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. H2SO4 . The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be (A) 2.8 (B) 3.0 (C) 1.4 (D) 4.4

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/c-wvfzosjcksqw.png" /> Here gaseous mixture formed is CO and CO2 when it is passed through KOH, only CO2 is absorbed, so the remaining gas is CO. Hence, weight of remaining gaseous product CO is (2/20)× 28=2.8g

Q. A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. $H_{2} S O_{4}$ . The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be

2.8

3.0

1.4

4.4

Here gaseous mixture formed is CO and $C O_{2}$ when it is passed through KOH, only $C O_{2}$ is absorbed, so the remaining gas is CO.

Hence, weight of remaining gaseous product CO is $\frac{2}{20} \times 28 = 2.8 g$

Q. A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. H2​SO4​ . The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be

2.8

3.0

1.4

4.4

Here gaseous mixture formed is CO and CO2​ when it is passed through KOH, only CO2​ is absorbed, so the remaining gas is CO. Hence, weight of remaining gaseous product CO is 202​×28=2.8g

Q. A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. $H_{2} S O_{4}$ . The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be

Here gaseous mixture formed is CO and $C O_{2}$ when it is passed through KOH, only $C O_{2}$ is absorbed, so the remaining gas is CO.

Hence, weight of remaining gaseous product CO is $\frac{2}{20} \times 28 = 2.8 g$