How do you measure the acidity of a liquid?

Question: How do you measure the acidity of a liquid?

Options:

Odometer
Thermometer
Ph Scale
Barometer

Correct answer:

Ph Scale

Other game answers:
Find the answers to guess the gif, logo quiz 2015, emoji puzzle and emoji nation.
You can find other questions and answers of trivia crack at triviacrackcheats.org (other languages are also available, for this game).