Answer:
Wasim and Nehra did the Proper testing
Explanation:
In acidic condition Blue litmus turns red
In basic condition Red litmus turns Blue
In order to test an Acidic solution we need Blue litmus.
Wasim Dipped the blue litmus in the solution : it will turn red and shows acid
Akram Dipped the red litmus in the solution : No it will not show, it's a test for base
Neha: Dipped both the blue and the red litmus in the solution one after other.
Blue litmus will turn red which will show Acidic nature, after that Adding Red litmus in it will not show any change as Red litmus only changes in Basic condition.
Therefore, Wasim and Nehra did the Proper testing
