MCQ
Which of the following exist as decahydrate?
  • A
    Caustic soda.
  • Washing soda.
  • C
    Baking soda.
  • D
    Both $(b)$ and $(c).$

Answer

Correct option: B.
Washing soda.
Washing soda occurs as decahydrate. Molecular formula of washing soda is $\ce{Na_2CO_3 .10H_2O}$.

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