Exams › NEET › Chemistry

Solubility of \( N a C l \) in \( D_{2} O, \) compared with its solubility in \( H_{2} O \) is:

1. less
2. equal
3. more
4. cannot be predicted

Correct answer: less

Solution

NaCl is less soluble in D2O because deuterium-containing water has slightly stronger O–D interactions and a different solvent structure than H2O. This makes it a bit less effective at separating and stabilizing Na+ and Cl− ions.

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