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'''Litmus test''' refers to the use of litmus paper as a [[pH]] indicator. It is also a phrase referring to questions designed to determine a person's opinion of social issues.
== Chemistry ==
In chemistry, a piece of litmus paper is placed in a solution. Chemical reactions with[[acids]] cause it to turn red, while reactions with [[alkalines]] cause it to turn blue.
==Politics==
The phrase "litmus test" is applied to questions designed to determine a person's opinion of social issues. They are common in political interviews, and [[liberals]] love to use them to exaggerate and demonize the views of [[conservatives]].
==Example==
"Where do you stand on Roe v. Wade" is a typical litmus test on the issue of [[abortion]].