Solution:
The above statement is true.Litmus is a natural indicator that turns red in the presence of an acid, and in the presence of a base, it turns blue. A blue litmus paper does not change in the presence of a basic solution and is not affected by any neutral solution. When blue litmus paper is dipped in a solution and remains blue, it shows that the solution is either basic or neutral. When blue litmus paper changes its colour from blue to red in a solution, it shows the solution is acidic.
