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• n  a white soluble compound (NaHCO3) used in effervescent drinks and in baking powders and as an antacid

• In the finals, Sonya spelled baccalaureate, saleratus and aileron correctly, drew a smile by asking whether the pronouncer meant an "ape or an underground worker" when he asked .

• bicarbonate of soda
• sodium hydrogen carbonate
• sodium bicarbonate
• baking soda