The capability of the solute to get dissolved to form a solution is called solubility. In the chart, the Y → X → Z is the order of greatest to least solubility. Thus, option 2 is correct.
What is solubility?
Solubility is defined by the solute's ability to get dissolved in the solvent and is influenced by the mass, temperature, pressure, size, etc. Solution Y has the greatest solubility as it can dissolve 12 gm of solute followed by solution X (10g), and the least soluble, solution Z (8g).
Therefore, the order of the solubility is Y → X → Z.
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