If it gives you something to do other than smoke, yes.
It depends on the brand and the type of pickles. Most pickles do contain sugar, but very little just to help preserve the pickles.
Pickles are usually made with a lot of vinegar, oil or salt. Any one of these will act as a preservative.
Vinegar and salt.
NaCl
It's possible, there is salt in pickles and if there is salt on the pop corn then that could aggravate the cold sore.
Pickles are not grown, they are small cucumbers , that are canned in vinegar, salt and sugar and some spices, they sit for a few days, and then become pickles.
Yes
Yes, both are sodium chloride.
Usually for flavour.
Pickles are made in such a way that they last longer the extremely high amount of salt and oil act as natural preservatives. The only thumb rule to store pickles is to avoid any kind of contact with water or moisture. Storing pickles in a glass or ceramic containers in a dry area would help them to stay from getting spoilt.
If you're pregnant and want pickles, you're probably after the salt. And if you're not pregnant and crave pickles, the reason is most likely the same. ( Pickles also contain a substantial amount of potassium.)
Pickles are conductive because of their acid content. The salt helps too. Pickles can even make a battery.