Slide the number of water molecules present in washing soda.
10

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Solution

The correct option is A 10
The chemical name of washing soda is sodium carbonate decahydrate. Its chemical formula is ${Na}_{2} {CO}_{3} . 10 H_{2} O$ . Water of crystallisation is the fixed number of water molecules present in a salt. In this case, ten water molecules are present.

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The number of molecules of water of crystallization present in washing soda are:

The number of molecules of water of crystallisation present in washing soda crystals is :

(a) five

(b) two

(d) seven

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