A hypothesis doesn't have to be a correct statement. Just pick a chemical and say this one will or will not keep the fruit from turning brown. Then give a brief statement about why you think this way.
That the lime was going to help the apple from turning brown.
you don't
An apple turning brown is both a chemical and a physical change. Physically it changes appearance by turning brown. Chemically it oxidizes when the air comes in contact with the enzymes and chemicals in the fruit.
The smoke contains nitrates which prevents meat from turning brown. The center of the sausage may not have the nitrates (and anti-browning chemicals) that the surface of the smoked sausage has.
they dont
Usually this is a cultivation problem. Is it too dry? Is it too wet? The symptoms are the same. It is unlikely to be a disease.
Minerals
if it its leafs are turning brown then that probably means that it is sick or is not getting enough light.
your not watering it?
well it doesn't really turn it brown it actually speeds up the proses of them turning brown even though vinegar is an acid it doesn't stop it from turning apples brown it speeds it up believe that it is a chemical in the apple and a chemical in the vinegar that interacts very bad.and the vinegars chemicals usually wins that's why vinegar speeds up the proses not slow it down
Diamonds of any coulour can be altered by chemicals and heat: a brown diamond included. Note, however, that a natural brown diamond can only be enhanced to appear more 'brown' or a different 'brown', not changed from another colour to brown by these alterations.
if it is the hair that is turning brown then yes, if it is the skin then no. go see a vet