# The dissolving of which salt will produce both a physical and chemical change?

For the purposes of your question, they are looking for answer $\left(d\right)$. Fluoride is the conjugate base of a weak acid, and thus in water will produce hydrolysis:
${F}^{-} + {H}_{2} O \left(l\right) r i g h t \le f t h a r p \infty n s H F \left(a q\right) + H {O}^{-}$