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 (Na2CO3), specifically the decahydrate form used in cleaning and laundry. Sodium bicarbonate is baking soda, while calcium compounds (carbonate and bicarbonate) have different applications and are not called washing soda.

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