Q. The correct order of pseudohalide ,polyhalide and interhalogen are
A) $BrI_{2}^{-} -$ ,$OCN^{-}$,IF_{5}
B) IF_{5}, $BrI_{2}^{-}$,$OCN^{-}$
C) $OCN^{-}$_{,}IF_{5,}$\ BrI_{2}^{-}$
D) $OCN^{-}$,$\ BrI_{2}^{-}$ ,IF_{5}
Explanation
(d)
Pseudohalide they are comination of more than one electronegative atoms which one unit negative charge, e.g. $OCN^{-},CN^{-}$ .
Polyhalide ions the complex ions which are fromed by reaction of halogens among themselves are called polyhalide ions e.g., $I_{3}^{-},\ BrI_{2}^{-}$.
Interhalogens they are the compounds which are formed halogen react among themselves. one of the halogens behave as cation and other acts as aninon e. g. IF_{5} , ICl_{5} , BrF_{3} .
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.