What type of solution is the $\mathrm{H}_2$ in palladium?

What type of solution is the $\mathrm{H}_2$ in palladium?
  1. Gas as solute and solid as solvent
  2. Gas as solute and liquid as solvent
  3. Gas as solvent and solid as solute
  4. Liquid as solute and gas as solvent

Solution

$\mathrm{H}_2$ in palladium describes a solid solution with gas dissolved in a solid matrix. Since hydrogen ($\mathrm{H}_2$) is a gas and palladium (Pd) is a solid, the solution contains gas as solute and solid as solvent.

This configuration corresponds to option A.

Asked in: MHT CET 2025 (05 May Shift 2)

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