Consider the following statements and arrange in the order of the true/false as given in the codes.
`S_1`:The IUPAC name of the compound `K_2[Ni(CN)_4]` is potassium tetracyanonickelate(II).
`S_2`:The oxidation number of cobalt in `K[Co(CO_4)]` is -1
`S_3`:`[Co(NH_3)_5 (NO_2)] (NO_3)_2` shows ionisation and linkage isomerism.
`S_4`:`[Ni(Cl)_4]^(2-)` is `Sp^3` hybridised

Options

A. F T T F
B. T T T T
C. F T T F
D. T T T F

Answer

C

Explanation

`S_1`:Pentaamminethiocyanato-N-chromium(III) tetrachlorozincate (II).
or
Pentaammineisothiocyanatochromium(III) tetrachlorozincate (II).
`S_2`: In `CoSO_4`, the oxidation state of Co is +2 i.e. `[Ar]^18 3d^7 4s^0` electrons configurations. It has two unpaired electrons so it is paramangetic and coloured.
`S_3:[Co(NH_3)_4(NO_2)_2]NO_3 & [Co(NH_3)_4(NO_2)(NO_3)]NO_2` show ionisation isomerism
`[Co(NH_3)_4(NO_2)_2]NO_3 & [Co(NH_3)_4(NO_2)(ONO)]NO_3` show linkage isomerism
This complex has cis- and trans isomers and the total isomers are 10.
`S_4`:The bond length C-O in CO itself is 1.128, while the bond length in `[Fe(CO)_6]` molecules are 1.15Å on account of synergic interaction between Fe and CO.