Consider the below statements and identify the correct answer. Statement I: Anhydrous sodium carbonate is used in soda-acid fire extinguishers. Statement II: Anhydrous sodium carbonate is dissolved in water and recrystallized to get washing soda crystals containing 10 molecules of water of crystallization.

Explanation

Statement I: Anhydrous sodium carbonate is used in soda-acid fire extinguishers. This statement is incorrect. Soda-acid fire extinguishers use sodium bicarbonate (NaHCO₃), not sodium carbonate (Na₂CO₃). Sodium bicarbonate reacts with acid to release carbon dioxide, which helps extinguish the fire. Statement II: Anhydrous sodium carbonate is dissolved in water and recrystallized to get washing soda crystals containing 10 molecules of water of crystallization. This statement is correct. When anhydrous sodium carbonate (Na₂CO₃) is dissolved in water and recrystallized, it forms washing soda crystals (Na2CO3⋅10H2O\text{Na}_2\text{CO}_3 \cdot 10\text{H}_2\text{O}Na2​CO3​ ⋅10H2​O) with 10 molecules of water of crystallization. Conclusion: Statement I is incorrect. Statement II is correct. Answer: The correct answer is that Statement I is false, and Statement II is true.