The correct statement(s) is/are : (A) The \( \mathrm{PF}_{6}^{-} \)ion exists (B) The \( \mathrm...

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The correct statement(s) is/are :
(A) The \( \mathrm{PF}_{6}^{-} \)ion exists
(B) The \( \mathrm{NF}_{6}^{-} \)ion does not exist
P
(C) \( \mathrm{N} \) can form \( \mathrm{p} \pi-\mathrm{p} \pi \) bonds with itself and with other
W elements having small size and high E.N.
(D) The catenation tendency is weaker in \( \mathrm{N} \) than \( \mathrm{P} \)
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