Definitely. It certainly could, if it wanted to.
No. It is possible for a comet to leave our solar system, but not the galaxy.
Periadioc Comet
Yes they all could destroy Earth depending how big it is, how big the impact is when it hits, and where it hits,but its possible. Hope this helps.
could you put comet in your dogs bath water
There is no possible way of smelling a comet without either a) it crashing to earth and it killing everyone or b) you landing on a comet in your lifetime to "sniff" it. so the answer is unknown because no one ever smelled a comet
Yes, it is humanly possible to see Halley's comet twice. A person can see it at a young age and again at an old age.
The Earth and the asteroid could be at a different points in the path.
Ice brought by comet impacts may be frozen in craters near the Moon's poles.
No
The comet was named after the man not the other way around. No man as far as I am aware has been named after a comet with the possible exception of Bill Halley and the comets?
Halley's Comet is an astronomical body not a terrestrial one. It is made of mainly frozen ices. A tsunami is not possible there.
That will completely depend on where the Earth and the comet are in their respective orbits. No single answer is possible.