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JEE Main levelSingle correct optionDifficulty 2 of 3bn124

Which row names $SCN X^{-}$ and $OCN X^{-}$ respectively?

Athiocyanate, cyanate
Bcyanate, thiocyanate
Cthiocyanide, cyanide
Dthiocyanate, cyanite

Answer: A

Replacing O of cyanate

OCN X^{-}

by S gives thiocyanate

SCN X^{-}

. The names are not interchangeable, and cyanide is

CN X^{-}

.

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