What turns blue litmus paper red Crossword Clue

Looking for the answer to “What turns blue litmus paper red” from the Universal crossword of March 30, 2025? It has 4 letters. Flip the tiles one at a time, try a hint first, or look through the rest of that puzzle.

Crossword answer

UNIVERSAL, MARCH 30, 2025

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Hints

Three clues to the answer, gentle first. Open one at a time.

Hint 1 Meaning

Hint 2 Anagram

Hint 3 Another clue

Seen before

This clue also appeared in the Universal on December 30, 2024.

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Questions

What is the answer to “What turns blue litmus paper red”?

ACID, 4 letters: a type of chemical compound.

When was “What turns blue litmus paper red” last seen in a crossword?

In the Universal crossword of March 30, 2025, and 1 more time before that.

How many letters does the answer have?

4 letters, starting with A.