alleryStart learning →The formula of washing soda is
ANaHCO3.2H2O
BNa2CO3.10H2O
CNa2CO3.5H2O
DNaOH.10H2O
Answer & Solution
Correct answer: B. Na2CO3.10H2O
1. Washing soda is a hydrated form of sodium carbonate.
2. Recrystallising sodium carbonate gives crystals with ten water molecules.
3. Its formula is Na2CO3.10H2O, a basic salt.
_Source: AP/TS SCERT Class 10 Physical Science, "Acids, Bases and Salts"_
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