Because oven cleaner contains Sodium Hydroxide (Na OH), a 'strong' alkali/base, to dissolve the grease, it would change Universal Indicator a deep blue/purple colour.
Universal indicator turns red when added to vinegar, indicating that the vinegar is acidic.
Alkalis turn universal indicator blue or purple.
Universal indicator would likely turn red in ethanol, indicating that it is acidic.
Universal indicator will turn red or pink in dilute hydrochloric acid.
Citric acid is a weak acid, so it would turn a universal indicator to orange or red.
Universal indicator turns red when added to vinegar, indicating that the vinegar is acidic.
Alkalis turn universal indicator blue or purple.
Universal indicator will turn red or pink in dilute hydrochloric acid.
Universal indicator would likely turn red in ethanol, indicating that it is acidic.
Universal indicator will turn purple or blue when mixed with a weak alkali.
black
Bronze
Citric acid is a weak acid, so it would turn a universal indicator to orange or red.
Sugar typically turns yellow on universal indicator paper, indicating that it is acidic.
When universal indicator is put in water soluion of alkalis (base) it indicates significant blue colour.
blue
Universal indicator will turn dark blue or purple when mixed with a strong alkali.