The substance that will form a solution when mixed with solid sodium chloride would be CH₂OH.
<h3>What is the solution?</h3>
A solution is only formed when a solute dissolves in a solvent.
In this case, CH₂OH are the only liquid solvents. However, NaCl is insoluble in while it is soluble in CH₂OH due to its polarity and Common-Ion Effect.
Thus, NaCl can form a solution only with CH₂OH.
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