Which of the following is NOT likely to be miscible in water?

Iron filings are not likely to be miscible in water because they are composed of solid iron particles that do not dissolve or mix with water effectively. Miscibility refers to the ability of two substances to mix in any proportion without separating into two phases. While alcohols, acids, and salts can all dissolve in water to varying degrees, iron filings remain as distinct solid particles even when mixed with water. This characteristic is due to the physical properties of metals, which do not break down to form a homogeneous solution in water.