From the MSDS information (link added) I would say, "Yes. A cyclopentane leak on the inside of the freezer would contaminate the food."
But, it would appear that there are other concerns with such a leak - like inhalation and contact hazards and flammability.
Not really. It's just pure carbon dioxide.
After you eat the contaminated food
Freon is the # 1 Culprit. No, it is never safe to eat any foods that have been contaminated. Toss it out and get your refrigerator repaired.
it can'tbe located any were as in water that is contaminated or contaminated food which should not be eaten
Once food is contaminated with lead, it cannot be removed and the food should be not used.
It depends on the type of contamination - but most often, NO. Food contaminated by bacterial food usually looks the same as uncontaminated food. Food contaminated by a fungus may look a bit different. Also many times the difference in appearance is so slight as to not be noticeable unless one looks very carefully and knows what to look for. In general the best protection against contaminated food is proper handling and storage.
No. Food can be contaminated with a variety of adulterants - most of which show no signs at all that they are present.
Freezer burn is not a food safety risk en.wikipedia.org/wiki/Freezer_burn
When you put food in the freezer, it helps store all the nutrients of the food and makes it last for a while until you thaw it out.
Eating contaminated food and drinking contaminated water
No. If put in a freezer it will stay frozen.
Your food starts to get a freezer burn