Yes

Yes

Of course if the pupil is so disruptive, disrespectful, dangerous and/or any number of other despicable behaviours the pupil couldn't careless about their exams, and if they did then they will learn their lesson very early in life " live by the rules" or you are out!

Yes. It's not about one pupil. It's about all the other pupils who have had their work disrupted.

Certainly - a school can exclude any pupil at any time if their behaviour merits it (for a fixed period, or permanently).

Ok so is it normal for teachers to spit in pupils faces and threaten to punch them, not forgetting throwing months of course work in the bin, thinking it was funny!!!!

If school rules have been broken in a way that requires exclusion then yes they can

If it is warranted then yes it is, whether they have exams coming up is irrelevant.

Yes.

Yes of course it is