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 battery acid : Pink
Arrange the solutions in order of their increasing pH values (starting with the one with the lowest pH).
Sulphuric acid(Acidic) < Car battery acid(Acidic) < Washing-up liquid(Slightly acidic) < Milk of magnesia(Basic) < Metal polish(Basic)< Oven cleaner(Basic).