If the vinegar is strong enough to be below 4.5 pH the litmus paper will turn (or stay) red.
It goes red as vinegar is an acid.
HCl (hydrochloric acid) is an acid so it will turn litmus paper red. and alkali will go from red litmus to blue.
Color of litmus will change.Red litmus will change into blue.
Red
Ammonia is a base, and will turn red litmus blue.
Mauve Colour
it turns blue litmus paper red
Because Vinegar is an acid, the litmus paper would turn red
HCl (hydrochloric acid) is an acid so it will turn litmus paper red. and alkali will go from red litmus to blue.
Color of litmus will change.Red litmus will change into blue.
Red
yellow
Green
Ammonia is a base, and will turn red litmus blue.
red
water is a neutral sullusion it goes green.
Red, and an alikili goes blue.
If if it is red Litmus paper, then it will remain red because vinegar is acidic. (Blue Litmus paper would turn red if you dipped it into vinegar).