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Litmus, used by alchemists in the Middle Ages and still readily available, is a naturally occurring pH indicator made from a mixture of lichen species, particularly Roccella tinctoria. The word litmus is literally from 'colored moss' in Old Norse (see Litr). The color changes between red in acid solutions and blue in alkalis.
Litmus test may refer to: Litmus test (chemistry), used to determine the acidity of a chemical solution; Litmus test (politics), a question that seeks to find the character of a potential candidate by measuring a single indicator; The Litmus Test, a Radio 4 programme presented by Fred Harris; The Litmus Test, a 2004 album by Cut Chemist
The concept became viral online after a 2020 Internet meme which posits that shopping carts present a litmus test for a person's capability of self-control and governance, as well as a way to judge one's moral character. Detractors of the theory have cited various reasons why returning a cart is unfavorable, with concerns about leaving children ...
The economist who’s been predicting a recession for 18 months says the ‘litmus test’ is finally here, especially with oil headed toward $100 a barrel Will Daniel September 27, 2023 at 2:23 PM
The metaphor of a litmus test has been used in American politics since the mid-twentieth century. [1] During United States presidential election campaigns, litmus tests the nominees might use are more fervently discussed when vacancies for the U.S. Supreme Court appear likely. Advocates for various social ideas or policies often wrangle ...
Over the past few weeks, Trump advisers have asked those seeking employment at the RNC about their views of fraud during the 2020 election, with the question serving as an apparent litmus test for ...
The battle for Virginia's General Assembly has attracted campaign dollars as it is seen as a litmus test heading into 2024. "Virginia is the big game in town, so without a lot of elections for ...
Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity. In an acidic medium, blue litmus paper turns red, while in a basic or alkaline medium, red litmus paper turns blue. In short, it is a dye and ...