How would you know if raw egg whites are gone bad?

One way to determine if raw egg whites have gone bad is to perform a visual inspection. If the egg whites have turned a pink, green, or iridescent color, or if there are any unusual spots or discoloration present, they may be spoiled. Additionally, you can smell the egg whites - if they have a strong, unpleasant odor, they are likely no longer safe to consume. Lastly, you can perform a float test by placing the egg whites in a bowl of water - if they float to the top, they may be spoiled and should be discarded.