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An amalgam such as mercury dissolved in sodium is classified under which category of binary solutions?
AGaseous solution
BLiquid solution
CAqueous solution
DSolid solution
Answer & Solution
Correct answer: D. Solid solution
1. In a binary solution the physical state of the solvent decides the category.
2. In an amalgam of mercury with sodium, sodium (the solid) is the solvent and mercury (liquid) is the solute.
3. A solution in which the solvent is a solid is called a solid solution.
4. Therefore an amalgam is a solid solution.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 9 Solutions "Types of Solutions", p.133_
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