Correct Answer: Sodium Carbonate (Na₂CO₃)
Subject: chemistry
Explanation: • <b>Key Fact</b> Sodium Carbonate (Na₂CO₃), commonly known as Washing Soda, has multiple heavy industrial applications. • <b>Supporting Detail</b> It is heavily used in the commercial manufacture of glass, paper, soap, and borax. • <b>Related Concept</b> It is also uniquely used as a foaming agent in toothpaste formulations. • <b>Why wrong options are wrong</b> NaCl is for food seasoning; CaSO₄ (Plaster of Paris) for setting bones; KNO₃ for fertilizers and gunpowder. • <b>Exam Trick</b> Washing Soda washes away dirt (soap) and clears views (glass). • <b>Additional Info</b> Sodium Bicarbonate (NaHCO₃) is Baking Soda, used primarily as an antacid and in bakery products.
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