Which of the following is a Pseudohalogen ?

Which of the following is an interpseudohalogen (pseudohalogen analogues of interhalogen)?

which of the following is not ?

which of the following is not ?

Which of the following is an example of condensation polymer (or) Which of the following is not an example of addition polymer

Which of the following is an example of condensation polymer (or) Which of the following is not an example of addition polymer

Which of the following is not an example of organochlorine which shows biomagnification?

Which of the following behaves like pseudohalogen compound:

Which of the following behaves like pseudohalogen compound:

Which one of the following ions is not a pseudohalogen-