Which is a characteristic property of acids? a. they turn blue litmus paper red. b. they turn red litmus paper blue. c. they taste bitter. d. they do not react with metals.

The correct answer is Option a.

Explanation:

Acid is defined as the chemical species which donates hydrogen ions in the solution.

Properties shown by acid:

Base is defined as the chemical species which donates hydroxide ions in the solution.

Properties shown by base:

Hence, the correct answer is Option a.

petroleum? coal maybe?

i would say b

explanation:

but i think i would need more information than that