Generally it is not, but check the label to be sure.
Kosher salt is free of iodine, and additive-free.
no
Most salt is kosher by default unless additives such as flavourings are added, at that point the salt would have to be certified kosher. 'Kosher salt' refers to a large grain salt that is used during the process of kashering meat. Iodized salt is kosher.
Yes
Yes, you can. Kosher salt is the same as table salt, only a larger granule.
Yes.
Iodized salt usually is a form of processed table salt, of which the grains are very fine (about 1/8 of a cubic millimeter each). Kosher salt (iodized or not) is salt that is used for koshering meat. Its grains are considerably larger than those of table salt (though sizes of Kosher salt grains vary).
By default, salt is kosher unless something is added to it to make it not kosher - usually flavourings. Kosher salt may or may not be iodized, you'd have to check the label on the package to be sure.
A solution of sodium chloride is called salted water or brine.
Non-iodized flake salt, also sometimes called "cheese salt". Salt in cheese is used both to give flavor and to preserve. Iodized salt has iodine in it which hinders some of the bacteria you want in the cheese. You can use kosher salt or any natural, non-iodized salt that is in a flaked form.
It's not recommended to use iodized salt in brines and curing mixtures because the added iodine can give the meat an off-flavor and discoloration. Additionally, the iodine may also inhibit the curing process by affecting the chemical reactions that occur during curing. It's best to use non-iodized salt, such as kosher salt or sea salt, for brining and curing.
Rock salt should NOT be used in your Neti Pot. It has several minerals which otherwise good for health, may have an irritating effect on the sinuses.