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Question

Which of these actions will cause more potassium nitrate to dissolve in a saturated potassium nitrate solution?
I. Grind the potassium nitrate and then add to the solution while stirring
II. Add more potassium nitrate while using a magnetic stirrer
III. Add more potassium nitrate and heat the solution

A
I only
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B
II only
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C
III only
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D
I and III only
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E
I, II, and III
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Solution

The correct option is D III only
Saturated solution means no more solute can be dissolved into it; so, if we want to dissolve more potassium nitrate in the saturated solution, then we have to increase the solubility of solvent and solubility of solvent can be increased by heating the solvent

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