Question

Blue
Red
Indigo
Pink
Violet
Yellow
Green
(Hint: strong acid, very strong acid, weak acid, strong base, very strong base, weak base, neutral,
very weak acid, very weak base]​

Answer 1

Explanation:

as per the above attached image of pH scale,

we can solve this question.

1. blue: weak base
2. red : very strong acid
3. indigo: strong base
4. pink : strong acid
5. violet : very strong base

remember that , if you are at 7 , I.e neutral , as we move left, acidic character increases and as we move right, basic character increases.