In my own opinion, as what I have seen from the pictures on the web (particularly at yahoo.com), a soup kettle is a kettle for making soup...it's probably used in elite restaurants and used for...
Yes! It's perfectly fine to cook a can of soup (or anything else that comes in the can) in the can. Just make sure you open it first.
If you want to reduce the volume of the soup, then no. If the soup is the exact consistency that you want (or too thick) put the cover on the pan.
to cook chicken soup it take 5 d***m minutes
well technacily not really because it is only possibyl to boil them.