Question

what does the litmus changes to is the presence of acid and alkali​

Answer 1

Answer:

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. ... For instance, ammonia gas, which is alkaline, turns red litmus paper blue.