Question

Identify the following solutions, whether they are acid or alkali.
Solution Change in Indicator Acid / Alkali
Litmus Phenolphthalein Methyl orange
1. -- No change --
2. -- -- Orange colour turns red
3. Red litmus turns blue -- --

Answer 1

1 neutral
2 acid
3 base

Answer 2

1)     When Phenolphthalein remains unchanged that means the solution is acidic in nature.

2. When the orangecolor of methyl orange turns red, this means that the solution is highly acidic.

3. When red litmus turns blue, this means the solution is basic in nature because basic solution turns red litmus blue.