Pblock Elementsii Result Question 16

16. Which one of the following species is not a pseudo halide?

(1997, 1M)

(a) $\mathrm{CNO}^{-}$

(b) $\mathrm{RCOO}^{-}$

(c) $\mathrm{OCN}^{-}$

(d) $NNN^{-}$

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Answer:

Correct Answer: 16. ( b )

Solution:

Pseudo halides must contain atleast one nitrogen atom.