Because it can spoil or get mold.
They will spoil. There are no preservatives in home canned preserves.
For the best taste yes refrigerate. If it is not open you do not need to refrigerate other then before you use it for best taste but once it is opened it needs to be kept in the refrigerator as indicated on the bottle
You don't need to, but since you'll be pouring it over ice anyway, you might as well.
For about a week can be more. But with all food, look at it, smell it, taste it and if it tastes ok then eat it,
There is no reason not to refrigerate them immediately. When I boil eggs, I either eat them or refrigerate them for later consumption.
Yes. Refrigerate all cheese.
picante sauce , should i refrigerate it?
yep. you refrigerate white and blush wine, not red though:)
yes So why don't they refrigerate them in the supermarket?
Yes, you should refrigerate zucchini to keep it fresh for longer.
Yes, it is recommended to refrigerate cucumbers to help maintain their freshness and crispness.