Question

Here are some results of solutions tested with universal indicator paper:

Sulphuric acid	:    Red
Metal polish	:    Dark blue
Washing-up liquid	:    Yellow
Milk of magnesia	:    Light blue
Oven cleaner	:    Purple
Car batter acid	:    Pink

Arrange the solutions in order of their increasing pH value (starting with the one with the lowest pH).

Answer 1

The solutions have been arranged below in the increasing order of their pH values.
Sulphuric acid (~ pH 1) < Car battery acid (~ pH 2) < Washing-up liquid (~ pH 5) < Milk of magnesia (~ pH 9) < Metal polish (~ pH 12) < Oven cleaner (~ pH 14)