Among the given options, option D is the right answer. Let us try to analyze each option in detail.
A solution results when a solute is mixed in a solvent (water in this case). When we increase the surface area of the solute, we are increasing the chances of collisions between the solvent and solute molecule and hence helping the solute dissolve more quickly. Try this at home by mixing sugar cubes with or without...
Among the given options, option D is the right answer. Let us try to analyze each option in detail.
A solution results when a solute is mixed in a solvent (water in this case). When we increase the surface area of the solute, we are increasing the chances of collisions between the solvent and solute molecule and hence helping the solute dissolve more quickly. Try this at home by mixing sugar cubes with or without grinding them. Note that the maximum solubility will stay the same, only the rate of dissolution increases by increasing the surface area of a solute.
Stirring the solution also increases the collisions between solute and the solvent and hence increases the rate of dissolution (but not the maximum amount of solute that can be dissolved in a given volume of solvent). This is the reason we use a spoon to mix sugar in our tea before it gets too cold.
Heating a solution provides kinetic energy to molecules and hence higher chances of collisions and more energy to break bonds. A hot solution has a higher solubility than a cold solution. Thus, unlike options A and B, heating also increases the maximum amount of solute that can be dissolved.
The solvent is water and hence grinding will not work with it. Grinding works better with solids.
Hence, option D is the answer.
Hope this helps.
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