Question

Which of them is not a synthetic indicator?
a) Methyl orange b) Phenolphthalein c) Litmus d) None of these

Answer 1

Answer:

phenophthalin is a synthetic indicator

Answer 2

(C) Litmus

Also known as Litmus Paper.

Litmus Paper

Litmus paper is a filter paper we treat with a natural-soluble dye that the lichens provide us. The piece of paper that gives the result that is referred to as litmus paper can come in use as a pH indicating tool.

Hope it's helps you ^_^