As orange contains acidic substances, a piece of pH paper would indicate a colour which is in the acid range and the strict colour may differ according to the fruit too.
the carrot is basic in nature so when ph paper dipped in it the colour changes
dark orange
blue
Otgfcch
blue
Lemon juice contains citric acid so blue litmus paper dipped in lemon juice will turn red indicating that it is acidic.
it turns acidic or very basic
blue
Red
Lemon juice is an acid and blue litmus paper turns red when dipped in an acidic liquid.
light pink
orange
It will become red !
Coke is acidic; a red color.
It stays blue.