Question

a solution turns blue, its pH is likely to be A) 1. B) 4. C) 5. D) 10

Answer 1

A solution turns blue if its pH is likely to be 10


this can be explained as,

substance which are basic in nature can turns a universal indicator to blue color.

Since, if the solution is of litmus redthen, the solution shall be basic.

Answer 2

when a solution get blue it's pH likely to be D 10
but the real answer should be 9