Question

4) write down what are the chemical indicators​

Answer 1

Explanation:

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. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.

Answer 2

Answer:

A chemical indicator is a substance that undergoes a distinct observable change when conditions in its solution change. This could be a color change, precipitate formation, bubble formation, temperature change, or other measurable quality.

Chemical indicators must be used as part of comprehensive quality control program, that also includes the use of biological indicators and physical monitors, to assure that the conditions for sterilization were met.