Answer: 2LiBr(aq) + F2(g) —> 2LiF + Br2
explanation: Br and F are both nonmetals. Nonmetals should only replace other nonmetals in a single replacement reaction.
We can collect a sample of that food and add a drop of blue litmus solution. If the color of the litmus solution changes to red, it contains an acid as one of its ingredients.
The first option: the basic unit of the nervous system
