The species that cannot act as an ambidentate ligand is:

1.	\(\mathrm{CN}^-\)	2.	\(\mathrm{NO}^-_2\)
3.	\(\mathrm{SCN}^-\)	4.	\(\mathrm{NH_3}\)

EAN of Fe in K₃[Fe(CN)₆] is

1. 34

2. 35

3. 36

4. 47

Which of the following has square planar structure?

1. [NiCl₄]^2-

2. [Ni(CO)₄]

3. [Ni(CN)₄]^2-

4. None of these

$\mathrm{Out}<mspace\; width="1em"></mspace>\mathrm{of}<mspace\; width="1em"></mspace>{\mathrm{TiF}}_6^{2-},<mspace\; width="1em"></mspace>{\mathrm{CoF}}_6^{3-},<mspace\; width="1em"></mspace>{\mathrm{Cu}}_2{\mathrm{Cl}}_2<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{NiCl}}_4^{2-}$ (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) ${\mathrm{CoF}}_6^{3-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{NiCl}}_4^{2-}$

Calculate the number of moles of AgCl precipitated when excess AgNO₃ solution is added to 100 mL of 0.024 M dichlorobis(ethylenediamine)cobalt(III) chloride solution.

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