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JEE Main202310 Apr 2023Evening ShiftChemistrys Block ElementsActual

Number of water molecules in washing soda and soda ash respectively are :

Options

  1. A1   and   10  
  2. B10   and   1
  3. C10   and   0
  4. D1   and   0

Correct answer

C. 10   and   0

Step-by-step solution

The chemical formula for washing soda is Na 2 CO 3 . 10 H 2 O , which means that each molecule of washing soda contains 10 water molecules. The chemical formula for soda ash is Na 2 CO 3 , which does not contain any water molecules. Therefore, there are 10 water molecules in washing soda and 0   water molecules in soda ash.

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