Question

the very harmful acid of world​

Answer 1

Answer:

hydrofluoric acid

.............

Answer 2

Answer:

Fluoroantimonic acid

Explanation:

Fluoroantimonic acid is a mixture of hydrogen fluoride and antimony pentafluoride, containing various cations and anions. This substance is a superacid, that can be over billion times stronger than 100% pure sulfuric acid, depending on proportion of its ingredients.