Rain can dissolve various types of rocks, primarily those containing soluble minerals like carbonates, sulfates, and halides. Some specific rock types susceptible to dissolution by rainwater include:

Limestone (Calcium Carbonate): Limestone is primarily composed of calcium carbonate (CaCO3) and is vulnerable to dissolution by water containing carbonic acid (H2CO3), a weak acid formed when carbon dioxide (CO2) from the atmosphere dissolves in water.

Dolomite (Calcium Magnesium Carbonate): Similar to limestone, dolomite consists of both calcium carbonate and magnesium carbonate (CaMg(CO3)2). It is also susceptible to dissolution by water with dissolved carbonic acid.

Chalk (Calcium Carbonate): Chalk is a form of soft, porous limestone largely composed of calcium carbonate and can be readily dissolved by acidic rainwater.

Gypsum (Calcium Sulfate): Gypsum is composed of calcium sulfate dihydrate (CaSO4·2H2O) and is susceptible to dissolution when exposed to water, although its solubility is somewhat lower compared to carbonate rocks.

Halite (Sodium Chloride): Halite, commonly known as rock salt, is primarily made up of sodium chloride (NaCl). It is highly soluble in water and readily dissolves, hence its occurrence in saline environments.

The dissolution of these rocks by rainwater contributes to various karst formations like caves, sinkholes, and underground drainage systems in certain regions.