Question

give an example of substance in which ions are present​

Answer 1

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Here is your answer

Impure Water, acid, base in this substance ions are present.

Answer 2

Explanation:

An ion is an atom or group of atoms where the number of electrons is not equal to the number of protons. When an atom loses or gains electrons, a positive or negative charge is the result. If electrons are gained, the ion is a cation and when electrons are lost, it is an anion.