Consider the following statements regarding Washing Soda (Sodium Carbonate Decahydrate): 1. Washing soda is prepared by heating baking soda and recrystallizing the product. 2. It is used for removing permanent hardness of water by precipitating dissolved calcium and magnesium ions as insoluble carbonates. 3. On exposure to dry air, washing soda crystals lose nine molecules of water of crystallization to form a monohydrate, a process known as efflorescence. Which of the statements given above are correct?

Options:

• A: 1 and 2 only
• B: 2 and 3 only
• C: 1 and 3 only
• D: 1, 2 and 3

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