Multiple choice

Which of the following is not an acid-base indicator?

  1. Blue litmus

  2. Methyl orange

  3. Phenophthalein

  4. Turmeric

  5. Magnesium hydroxide

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

It is used as an antacid to neutralise the excessive acidity in the stomach. It is sold as 'milk of magnesia'.