greenish yellow
Blackcurrant juice turns a bluish-black color in an alkali due to the presence of anthocyanins, which are pigments that change color based on pH levels.
red
brown
Citric acid is a weak acid, so it would turn a universal indicator to orange or red.
No colour
Universal indicator will turn red or pink in dilute hydrochloric acid.
Red!
red
Acid can't turn red litmus paperbur base canturn it blue .
turn signal flasher for inside indicater
if you are working with a strong acid the lithmus paper will turn red.
Push in on the turn signal indicater