First slide

Interhalogen compounds

Question

Which one below is a pseudohalide?

Moderate

A

CN^-
B

ICl
C

IF₅
D

$I_{3}^{-}$

Solution

Pseudohalide ions and Pseudohalogens. There are certain monovalent negative ions made up of two or more electronegative atoms which exhibit properties similar to those of halide ions. Such ions are known as pseudohalide ions just as halide ions, pseudohalide ions have also corresponding dimeric molecules. These are called pseudohalogens and show properties similar to those of halogens.
Pseudohalide Pseudohalogens
${CN}^{-}$ cyanide ${(CN)}_{2}$ Cyanogen
${SCN}^{-}$ Thiocyanate ${(SCN)}_{2}$ Thiocyanogen

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