Question

5. Name one indicator which turns red on adding a base.​

Answer 1

Answer:

red litmus 

Explanation:

Litmus is a natural indicator.

There are two types of litmus paper: red litmus paper and blue litmus paper. Blue litmus paper turns red if the substance is acidic. Red litmus paper turns blue if the substance is basic or alkaline. Litmus turns red in acidic solutions and blue in basic solutions.