Not if you were adapted to that environment.
Perhaps, but I'm talking about it from a human point of view.
People look for "Earth-like" worlds for life, but I like to think about the potential for xeno-life in extreme environments. Just because our life is based on a beniegn water, carbon system doesn't mean that it can't develop based on (to us) exotic chemistry and elements in extreme conditions that we barely understand.
The chemistry that terran life is based on is actually pretty probable; water, carbon and nitrogen are pretty common in the universe, and carbon is a very reactive molecule. Water is also a very good solvent for life; it has certain qualities that make it ideal for life.
I'm not saying that "life as we know it" is the only life possible, just that life as we know it is bound to be pretty common due to the abundance of it's constituent parts. If you however
do have an idea of how so called "alternate biochemistries" would work, give a better explanation then "it's alien lolz".
And we aren't "normal". Even life pretty similar to us could choke to death in our atmosphere...