Question

Number of molecules of water in one molecule of washing soda is

• A. 2
• B. 5
• C. 8
• D. 10

Hint:

Washing soda (\( \text{Na}_2\text{CO}_3 \cdot 10\text{H}_2\text{O} \)) contains 10 water molecules of crystallization.

Answer 1

The Correct Option is D

Washing soda has the chemical formula \( \text{Na}_2\text{CO}_3 \cdot 10\text{H}_2\text{O} \). This indicates that one molecule of washing soda contains 10 molecules of water of crystallization.