Answer :
The solubility of a substance is greatly affected by the temperature and it is clear from the graph. The solubility of NaClO3 rapidly increases with increase in temperature. Hence, option D is correct.
What is solubility?
Solubility of a substance is the fraction of its concentration which can be dissolved in a particular solvent at specific temperature. Solubility of the substance depends on its bont type, molecular mass, temperature and pressure.
As the temperature increases, the thermal energy gained by the molecules make them energetic and reduce the intermolecular forces leading to greater solubility and solute- solvent interaction.
It is clear from the figure that, exect for NaCl, the solubility of all the solutes increases with temperature. And the rapid increment is shown by NaClO3.
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