In Dumas' method, the evolved gas mixture is collected over an aqueous solution of potassium hydroxi — Practical Organic Chemistry and Purification Chemistry Question

💡 Solution & Explanation

The evolved mixture contains $CO_2$, $H_2O$, and $N_2$. The $KOH$ completely absorbs the carrier $CO_2$ gas, leaving only the pure volume of $N_2$ to be accurately measured.