pH paper shows light blue colour when dipped into milk of magnesia. This indicates that milk of magnesia is:

Correct option is A

The correct answer is (a) a mild base.

Explanation:

• When pH paper turns light blue upon being dipped into milk of magnesia, it indicates that the substance is basic in nature.
• Milk of magnesia is a mild base, commonly used to treat acidity and indigestion.
• A pH paper turning blue suggests that the pH of the substance is greater than 7, which is characteristic of a base.

Information Booster

• Milk of Magnesia: The chemical name of milk of magnesia is magnesium hydroxide (Mg(OH)₂), which is a mild base.
• pH Indicators: pH paper changes color depending on the acidity or alkalinity of a substance, with blue indicating basicity.
• Acids and Bases: Acids have a pH less than 7, while bases have a pH greater than 7.