Yes or any small rodent.
350FPS would be sufficient
Yes
No, a pellet gun can't kill a bear it will only make it angry. There for it will eaither attack you or just ignore it.
It is passable to kill a cat in the right situation.
No... Corrected answer.-------------- It depends on the caliber and power of your Pellet gun. But Yes it is possible. In fact many pellet guns and rifles are used for rodent control.
Yes
If you are talking about a PCP (PreCharged Pneumatic) rifle. With a .45 caliber pellet, then "Yes" It can. I don't believe there is a 40 Caliber pellet gun.
A head shot with hollow point pellets would be best.
Possible- depending on the pellet gun. I hunt smaller animals (squirrels) with a Sheridan 5mm rifle. It WILL kill a squirrel at 45 yards. However, a squirrel and a turkey are 2 very different animals. To kill a turkey cleanly, it would have to be a head shot- and turkeys are VERY skittish animals. You also need to check if it would be LEGAL to kill a turkey with a pellet gun in YOUR state (assuming we are talking about a wild turkey) The game laws are different for each state.
Yes but it is not a humane way to kill the rodent. A pellet gun would be better. BB's don't deform when they impact the rodent, So the squirrel suffers before death. A pellet deforms on impact and will put the squirrel down quickly.
Yes. Under the right circumstances.
No. Even if it would fit in the chamber, there is no firing pin on a pellet gun.