Regarding this reaction correct statement is/are:

CHEMISTRY · Single correct · A Level · Chemistry · Transition metals and their chemistry · Transition metals and their chemistry

Problem

\text{K}_2[\text{Ni}(\text{CN})_4] \xrightarrow[\text{NH}_3]{\text{K in liq.}} 'X'

Regarding this reaction correct statement is/are: (1) 'X' is

\text{K}_4[\text{Ni}(\text{CN})_4]

(2) The oxidation state of Ni changed +2 to zero (3) The structure of 'X' is tetrahedral (4)

[\text{Ni}(\text{CN})_4]^{2-}

is square planar complex