Question

Litmus is used to test either substance is

• A. aqueous or pure liquid
• B. semi-solid or solid
• C. acidic or alkaline
• D. moist gas or dry gas

Answer 1

The correct option is C acidic or alkaline

Litmus is a solution of different dyes made from lichen. This is then put onto filter paper. The paper can then be used to give a rough indication of the pH value of a solution. Blue litmus paper will turn red when acid is present; red litmus paper will turn blue when alkalines are present.