HgCl₂ and I₂ both, when dissolved in water containing ${\mathrm{I}}^{-}$ ions the pair of species formed is

 

1. ${\mathrm{HgI}}_2, {\mathrm{I}}^{-}$

 

2. ${\mathrm{HgI}}_4^{2-}, {\mathrm{I}}_3^{-}$

 

3. ${\mathrm{Hg}}_2{\mathrm{I}}_2, {\mathrm{I}}^{-}$

 

4. ${\mathrm{HgI}}_2, {\mathrm{I}}_3^{-}$

 

The correct order of the stoichiometries of AgCl formed when AgNO₃ in excess is treated with the complexes: CoCl₃.6NH₃, CoCl₃ .5NH₃, CoCl₃.4NH₃ respectively is:

1. 3AgCl, 1AgCl, 2AgCl

2. 3AgCl, 2AgCl, 1AgCl

3. 2AgCl, 3AgCl, 1AgCl

4. 1AgCl, 3AgCl, 2AgCl

The type of isomerism shown by the complex  $\left[{\mathrm{CoCl}}_2{\left(\mathrm{en}\right)}_2\right]$ is:

The geometry and magnetic behaviour of the complex [Ni(CO)₄] respectively are:

1. Square planar and diamagnetic.

2. Tetrahedral and diamagnetic.

3. Square planar and paramagnetic.

4. Tetrahedral and paramagnetic.

Which of the following has the longest C ­—O bond length? (Free C—O bond length in CO is 1.128 )

Number of possible isomers for the complex [Co(en)₂Cl₂]Cl will be:
(en=ethylenediamine) 

The hybridization involved in complex ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$is : (Atomic number of Ni=28)

1. $ds{p}^2$

2. $s{p}^3$

3. $d^{2}s{p}^2$

4. $d^{2}s{p}^3$

The IUPAC name for complex ion, [Fe(CN)₆]^3- is:

Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is

1. $\left[Ni\right(H_{2}O{)}_6{]}^{3+}$

2. $\left[Fe\right(H_{2}O{)}_6{]}^{3+}$

3. $\left[Co\right(H_{2}O{)}_6{]}^{2+}$

4. $\left[Co\right(H_{2}O{)}_6{]}^{3+}$