I do not know what you mean by raw butter: no butter is cooked.
If you mean unsalted butter, it will likely go bad more quickly because salt is a preservative. But typically, all butter lasts longer in a french butter dish (also known as a butter bell -- it has a section for water, and a section for the butter).
No. It may kill any bacteria, but the butter will still smell and taste rancid.
Go buy fresh butter
Rancid.
Do you mean 'synthetic' butter? And by rancid do you mean it doesn't taste as good as cow's butter? If so, simply because synthetic butter is generally a mixture of oils, water and flavorings. Butter is made from cream which comes from cows.
"Turned" in the given sentence is a verb in its past tense. In this instance, "turned" is being used as a synonym for "became", and "rancid" is an "objective complement" of the "predicate adjective" type.
Having a rank smell or taste, from chemical change or decomposition; musty; as, rancid oil or butter.
Having a rank smell or taste, from chemical change or decomposition; musty; as, rancid oil or butter.
Rancid oils taste bad, and contain free radicals, some of which are potentially carcinogenic. The potential for harm is low, however; eating rancid peanut butter probably won't result in a doctor or hospital visit.
no because it cant be if it was it would kill you
Fatty Acid
my stomach says 'yes!'
Ghee or clarified butter has it's characteristic smell which is usually quite aromatic, so if it smells foul or rancid it should be discarded.