Question 1
Vinegar is often used as a preservative measure in the pickling of vegetables. Its effect is due primarily to its content of
◦ salt.
◦ phenols.
◦ acetic acid.
◦ tartaric acid.
Question 2
What component of wood smoke appears to have a preservative effect?
◦ Sodium benzoate
◦ Acetic acid
◦ Lactic acid
◦ Phenols.