Multiple choice general knowledge science & technology

Washing soda is the common name for

  1. Sodium carbonate

  2. Calcium bicarbonate

  3. Sodium bicarbonate

  4. Calcium carbonate
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A Correct answer
Explanation

Washing soda is sodium carbonate decahydrate (Na2CO3·10H2O), used in washing and water softening. Calcium bicarbonate and calcium carbonate are different compounds. Sodium bicarbonate is baking soda, not washing soda.

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