**Assertion (A):** In the reaction , of reacts with of to form of . <br>**Reason (R):** The reaction — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

While the law is true, $10 \text{ g } H_2$ needs $80 \text{ g } O_2$ to react completely. Here $O_2$ is limiting. Only $1.25 \text{ g } H_2$ will react with $10 \text{ g } O_2$ to form $11.25 \text{ g } H_2O$. Total mass ($10+10$) remains $20 \text{ g}$, but $20 \text{ g}$ of *product* is not formed. Assertion is false. [1, 9]