What is the neutral colour of a litmus solution when it is neither acidic nor basic?
Correct Answer: Purple
Subject: chemistry
Explanation: • <b>Key Fact</b>
In distilled water (neutral), litmus has a purple colour.
• <b>Supporting Detail</b>
Litmus is extracted from lichens, a plant of the Thallophyta division.
• <b>Related Concept</b>
It turns red in acidic solutions and blue in basic solutions.
• <b>Why wrong options are wrong</b>
Red and blue are its colours in active acidic/basic media, not neutral.
• <b>Exam Trick</b>
Neutral = Purple (mixing red and blue gives purple).
• <b>Additional Info</b>
Universal indicator turns green in neutral solutions, but litmus is purple.