Which one of the following can be used as an acid- base indicator by a visually impared student ?
A. Litmus
B. Turmeric
C. Vanilla essence
D. Petunia leaves
Answer:C
Which one of the following can be used as an acid- base indicator by a visually impared student ?
A. Litmus B. Turmeric C. Vanilla essence D. Petunia leaves