$\mathrm{Out}<mspace\; width="1em"></mspace>\mathrm{of}<mspace\; width="1em"></mspace>{\mathrm{TiF}}_6^{2-},<mspace\; width="1em"></mspace>{\mathrm{CoF}}_6^{3-},<mspace\; width="1em"></mspace>{\mathrm{Cu}}_2{\mathrm{Cl}}_2<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{NiCl}}_4^{2-}$ (At. no. Z of Ti = 22, CO = 27, Cu = 29, Ni = 28), the colourless species are

(a) ${\mathrm{TiF}}_6^{2-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{CoF}}_6^{3-}$

(b) ${\mathrm{Cu}}_2{\mathrm{Cl}}_2<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{NiCl}}_4^{2-}$$$

(c) ${\mathrm{TiF}}_6^{2-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{Cu}}_2{\mathrm{Cl}}_2$

(d) ${\mathrm{CoF}}_6^{3-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{NiCl}}_4^{2-}$

Which of the following has square planar structure?

1. [NiCl₄]^2-

2. [Ni(CO)₄]

3. [Ni(CN)₄]^2-

4. None of these

EAN of Fe in K₃[Fe(CN)₆] is

1. 34

2. 35

3. 36

4. 47

The species that cannot act as an ambidentate ligand is:

If excess of AgNO₃ solution is added to 100ml of 0.024M Solution of dichlorobis(ethylene diamine) cobalt(III) Choloride, how many moles of AgCl will be precipitated?

1. 0.0012

2. 0.0016

3. 0.0024

4. 0.0048

The number of geometrical isomers possible for a square planar complex $[\mathrm{Mabcd}{]}^{\pm \mathrm{n}}$ are

(1) 2

(2) 3

(3) 4

(4) 5

[Fe(H₂O)₆]³⁺ and [Fe(CN)₆]^3- differ in

(1) Magnetic nature

(2) Oxidation number

(3) Co-ordination number

(4) Structure