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Q. Which of the following statement(s) about acids is/are correct?
  1. They change the colour of red litmus to blue.
  2. They change the colour of blue litmus to red.
  3. They have pH value less than 7.
Select the correct answer from the codes given below:
Answer: Only 2 and 3
Notes: Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5 – 8.3 at 25 °C.

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This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app.

Question Number: 78 in Chemistry-12-Acids, Bases and Salts in above course in App.