A) \[I{{F}_{7}}\]
B) \[{{(CN)}_{2}}\]
C) \[ICl_{2}^{-}\]
D) \[I_{3}^{-}\]
Correct Answer: B
Solution :
Ions which consists of two or more electronegative atoms of which at least one is nitrogen and have properties similar to those of halide ions are called pseudohalide ions. Just as halide ions have corresponding diatomic molecules, pseudohalide ions have also corresponding dimeric molecules. These are called pseudo halogens and show properties similar to those of halogens. eg, \[{{(CN)}_{2}},{{(SCN)}_{2}},{{(OCN)}_{2}}\]
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