calories
No.
"Hard" drinks contain alcohol. Anything without alcohol is a soft drink.
No.
Soft drinks are pure sugar, and have no nutritional value. They are empty calories and not good for you at all. In addition, the sugar they contain is in the form of high fructose corn syrup, which has an even greater impact on your insulin levels than table sugar.
Soft drinks do not contain foam as an ingredient. However, when opened or poured, some carbonated soft drinks can produce foam due to the release of carbon dioxide gas.
Sodas and soft drinks do NOT contain gluten.
Most soft drinks contain sugar, and sugar is addictive. It's not the drink, it's the sugar in it.
Most contain artificial colors of some type.
They don't contain fat, they contain sugar which your body converts to fat.
Usually aluminium, occasionally steel, with a thin layer of tin.
Candy / soft drinks / anything sweet... but you probably knew that.
No, they do not. As a matter of fact, they enhance these effects, since most of the soft drinks contain CO2, which helps to deliver alcohol to your blood more quickly.