Question

Which one will change from red litmus to blue?​

Answer 1

Explanation:

Light 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 (77 °F). Neutral litmus paper is purple. Litmus can also be prepared as an aqueous solution that functions similarly.

Answer 2

Explanation:

Red litmus paper turns blue under basic or alkaline conditions.