p-Block elementsMedium

Question

Which one of the following species is no pseudo halide ?

Options

A.CNO-
B.RCOO-
C.OCN-
D.NNN-

Solution

Pseudohalides are the ions which resembles with halide ions in their properties. Their dimers are called pseudohalogens. Except RCOO- (carbxylate ion), all other are pseudohalides.

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