Question

30.A substance that changes color in the presence of acids and bases is called...Select one:a. an anhydride.b. an indicator.c. a precipitate.d. a salt.

Answer 1

B. Indicator

Step-by-step explanation

Indicator chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution.