Question

give reason: a)cleaning Shahabad tile with dilute hydrochloric acid is a chemical change​

Answer 1

Hydrochloric acid dissolves calcium carbonate, but as a powder it has hugely more surface area for the acid to attack than a tile, thus dissolves far faster in powder form than in a solid tile form .

Since muriatic acid is a harsh chemical, mix it outside. Follow the warning and instructions on the bottle, and be sure to wear rubber gloves and eye protection. Apply the mixture with a nylon scouring pad in small circles over the tile. After rinsing the solution off with cold water, the tile will look as good as new.