Could Tailed Beasts Die?

Because the tailed beasts are pure chakra, they cannot actually be killed; if they or their jinchūriki die, their chakra will re-coalesce in time. ... However, if a tailed beast uses a life sacrificing power up such as Baryon Mode, it will have its physical form destroyed and die permanently.

Can tailed beasts come back to life?

The short answer is that Kurama won't come back to life or be revived from another ten-tails.

Can a Biju die?

A bijuu can indeed die, in a way. A bijuu is purely made up of chakra, some times the are even referenced to as Chakra Monsters. The same rules apply to the bijuu as to all the normal humans in the world. If your chakra runs out, you die.