Which word should be used in this imaginary situation?
Teacher : I am afraid, all your ten answers are wrong.
Student : Well I was sure for my answer for the question number 10. Even is that one wrong [.......]?
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Teacher : I am afraid, your all ten answers are wrong.
Student : Well I was sure for my answer for the question number 10. Even is it wrong .......?
As Fumblefingers pointed out in a comment above, you have several options for positioning the word all, but your choice isn't one of them. Also, having a comma after "afraid" makes it look like the teacher is actually scared of something. Let's go with:
Teacher: I am afraid all ten of your answers are wrong.
Student's response needs a little work too. Usually we say that we are "sure of" things, not "sure for" things. Also, Question #10 doesn't need an article. (It would if we were calling it "the tenth question," or "the last question") Finally, Student's second sentence doesn't really work, but fixing the grammar of it may make your question a moot point, so I will leave it be - for now.:
Student : Well, I was sure of my answer for question number 10. [ Even is it wrong .......?]
You have a few choices for that second sentence.
Given the context (Student got all of the questions wrong, but really thought he had a good answer for number 10) I think the first version makes the most sense. He isn't really asking if it is wrong (teacher has already told him so) but expressing dismay. Version 2 and 3, with too and also would make more sense if he didn't yet know whether that last answer was incorrect.
Teacher: I am afraid that your first nine answers were terrible and you made a small mistake in #10. Student: Is it wrong too/also?
Choosing to use neither is not based on whether sentences have a "negative" meaning (wrong, bad, evil). It is used to negate a sentence - to reverse the meaning - when there are two subjects to the sentence. Your teacher might say "Neither #2 nor #6 are correct." (Both are wrong.) Or she might say "Neither #2 nor #6 are incorrect" (Both are right.) One of the subjects may be implied by context. "Your answer to #2 was not correct. Neither was your answer to #6."
Teacher : I am afraid all ten of your answers are incorrect. Student : Well I was sure of my answer for question number 10. Even it is incorrect?