Soft drinks will make you burp because they are injected with a lot of carbon, to make bubbles and of course your body will reject. If you want to avoid burping, take your soda, pour into glass and let stand. So you won't have all the groovy bubbles, but at the same time, will reduce burbs and farting
Because they have carbonated water.
Gasses in the carbonation (fizz). Gas makes you burp.
Because of the carbonated water duh