why does milk go yellow when you freeze it?

Answer 1

It's because fat and water in milk separate when you freeze it and you can see the fat (which is yellow) more clearly.

Answer 2

The yellowish color of milk is caused by the presence of carotene which is the same chemical that gives carrots thier color. Whole milk with fat is more yellow than other milk and when you freeze it the water and the fat content in the milk start to seperate and the yellowish color is then more noticable. In other words if you freeze nonfat milk it wont turn yellow since it has no fat or really not enough fat to notice any color change.

Answer 3

It is simply because you are changing the properties of the milk and taking it from a liquid to a solid. Think of it in terms of water and ice (or snow), clear when liquid and white when solid.

But when you bring it back from solid state to a liquid state the color returns again.

But if you'd like a little known tip on how to make milk stay fresher longer, add just a pinch of salt when you first open the carton. Works great for cream too!

Answer 4

The colour of something is determined by the colour it reflects, i.e the grass is green because it reflects green light. Milk is white because its components reflect all light. When it is frozen the protein in the milk change form in a process know as denaturisation. Because the protein molecules have changed shape, they reflect slightly different wavelengths of light, making the milk appear to be yellowish in colour.

Answer 5

I'm not being funny -I really am curious to know why you freeze milk? I have never heard of anybody doing that, it sounds a bit gross.

Answer 6

The proteins in the milk are being denatured by the cold temperature

Answer 7

If you get homogenised milk it doesn't do this.

However there's nothing actually wrong with the yellow stuff, it's perfectly good to drink, it just looks unappetising.

Answer 8

if you freeze it for a long time

Answer 9

Because its afraid of the cold!

Answer 10

Frozen milk is so gross.