Multiple choice general knowledge science & technology

Acids change a litmus paper from

  1. red to blue

  2. blue to red

  3. red to green

  4. green to purple
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Acids turn blue litmus paper red - this is a fundamental property of acidic solutions. The red color in litmus comes from a natural dye that changes structure in acidic environments. Acids do not change litmus to green or purple, and they never change red to blue.

Keep practicing — related questions