That depends on the company that makes it.
Kosher soup is any soup that is made following the laws of kashrut (Jewish dietary laws). It is not a specific type of soup.
The general meaning for kosher is "clean/fit or proper" and if you relate this to the cabbage soup diet, yes it is kosher and can help you stay healthy.
One can find a recipe for matzo ball soup on websites such as Wikipedia, Food Network or All Recipes. It is also available on Mani Schewitz, Kosher Food and The Kitchen.
Those Jews who like chicken soup eat chicken soup. Religiously observant Jews would require that the chicken soup be kosher.
Delicatessen places serve kosher food. And if you are talking about 'deli' food, it is usually kosher. _______ Delis are only kosher if they're kosher certified. Most delis aren't kosher.
No, it's parve.
Only if kosher ingredients are used, including the chicken parts, and cooked in and with a pot and utensils only used for kosher meat cooking.
Frog legs are not considered kosher food.
Menudo is made with Tripe. Tripe is a part of the digestive tract, usually of cows or sometimes of swine. That makes it OFFAL (animal guts). If you were able to find kosher cow tripe, you could make kosher menudo. (There is no issue with offal so long as it comes from a kosher animal). I have personally found my own "Menudo Curry" to be extremely cheap to make and even more rewarding to eat. Just don't forget the Coriander! (Do not share with the unappreciative, more for us!)
soup (chicken, lamb, beef, vegetable), salad,
Yes it is kosher
Cleaner and healthier than non-kosher food.