<p><strong>Yolk and egg white test: </strong>You can also tell if the egg has gone bad by looking at its yolk. If the yolk is flat and breaks easily, the egg might be old. If the yolk moves around easily, this means that the egg has weakened with time. The yolk of a fresh egg is usually more bright and yellow in colour, but that is not a reliable test. The colour of the yolk is determined by the diet of the hen who laid it, so the shade of yellow or orange may not have much to do with its freshness. Inspect the colour of the egg white or albumen. If the egg white is cloudy it is a fresh egg, but if the white is clear, the egg is old. While inspecting the colour of the egg white, also check if it has a pink or a greenish hue. This means that the egg has been contaminated by Pseudomonas bacteria and is no longer safe for consumption. Similarly, black or green spots inside the egg indicate that it has been contaminated by fungus and must not be consumed.</p>
