A mixture of `H_2C_2O_4` and `HCOOH` is heated with conc `H_2SO_4`. The gas produced is collected and on treatment with KOH solution, the volume of the gas decreases by `(1)/(6)` calculate the molar ratio of the two acids in the original mixture.

Explanation

To solve the problem, we need to analyze the reactions taking place when the mixture of oxalic acid (H2C2O4) and formic acid (HCOOH) is heated with concentrated sulfuric acid (H2SO4). We will then determine the molar ratio of the two acids in the original mixture based on the volume change of the gas when treated with KOH.

### Step 1: Identify the reactions
1. **Formic acid (HCOOH)** reacts with concentrated sulfuric acid to produce carbon monoxide (CO) and water (H2O):
\[ \text{HCOOH} \xrightarrow{\text{H}_2\text{SO}_4} \text{CO} + \text{H}_2\text{O} \]
This means 1 mole of HCOOH produces 1 mole of CO and 1 mole of H2O.
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