$\mathrm{A}\left[\mathrm{M}\right({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$ complex typically absorbs at around 600 nm. It is allowed to react with ammonia to form a new complex $\left[\mathrm{M}\right({\mathrm{NH}}_3{)}_6{]}^{2+}$ that should have absorption at :

Which of the following order of CFSE is incorrect?

For which of the following ${\mathrm{d}}^{\mathrm{n}}$ configuration of octahedral complexes, can not exist in both high spin and slow spin forms:

(I) ${\mathrm{d}}^3$                  (II) ${\mathrm{d}}^5$               (III) ${\mathrm{d}}^6$             (IV) ${\mathrm{d}}^8$

Consider the complex $\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_4{\mathrm{CO}}_3]{\mathrm{ClO}}_4$ , in which coordination number, oxidation number and number of d-electrons on the metal are respectively.

The $\mathrm{\pi }$-ligand which uses its d-orbital during synergic bonding in its complex compound.

The IR stretchin frequencies of free CO, and CO in $\left[\mathrm{V}\right(\mathrm{CO}{)}_6{]}^{-} , \left[\mathrm{Cr}\right(\mathrm{CO}{)}_6{]}^{} \mathrm{and} \left[\mathrm{Mn}\right(\mathrm{CO}{)}_6{]}^{+}$ are 2143 ${\mathrm{cm}}^{-1}$, 1860 ${\mathrm{cm}}^{-1}$,2000 ${\mathrm{cm}}^{-1}$ and 2090 ${\mathrm{cm}}^{-1}$, respectively. Then correct statement about metal carbonyls is :

The $\mathrm{\pi }$-acid ligand which uses its d-orbital during synergic bonding in its complex compound:

Select the correct statement about given square planar complex

Correct sequence of CO bond order in given compounds is:

(P) $\mathrm{Fe}(\mathrm{CO}{)}_5$   (Q) CO    (R) ${\mathrm{H}}_3\mathrm{B}\stackrel{}{\leftarrow }\mathrm{CO}$     (S) $\left[\mathrm{Mn}\right(\mathrm{CO}{)}_5{]}^{+}$

In which of the following complex ion the value of magnetic moment (spin only) is $\sqrt{3}$

BM and outer d-orbitals is used in hybridization.

The inner orbital complex that exhibits geometrical but not exhibit optical isomerism is -

Match List-I and List-II and select the correct answer using the codes given below the lists:

                       List-I                                                 List-II

(A) $\left[\mathrm{Ni}\right({\mathrm{NH}}_3{)}_6{]}^{2+}$                                                    (1) ${\mathrm{sp}}^3$

(B) $[{\mathrm{PtCl}}_4{]}^{2-}$                                                         (2) ${\mathrm{sp}}^3{\mathrm{d}}^2$

(C) $\left[\mathrm{Ni}\right(\mathrm{CO}{)}_4]$                                                         (3) ${\mathrm{dsp}}^2$  

(D) $\left[\mathrm{Co}\right(\mathrm{ox}{)}_3{]}^{3-}$                                                      (4) ${\mathrm{d}}^2{\mathrm{sp}}^3$

         A        B         C          D                                A        B         C          D 

The hybridization of the complex $\left[{\mathrm{CrCl}}_2\right({\mathrm{NO}}_2{)}_2({\mathrm{NH}}_3{)}_2{]}^{-}$ is:

Which of the following statement is not true for the reaction given below?

$\left[\mathrm{Cu}\right({\mathrm{H}}_2\mathrm{O}{)}_4{]}^{2+}+ 4{\mathrm{NH}}_3\stackrel{}{\rightleftharpoons }\left[\mathrm{Cu}\right({\mathrm{NH}}_3{)}_4{]}^{2+}+4{\mathrm{H}}_2\mathrm{O}$

The incorrect match among the following is:

Complex compounds                            Type of hybridization

Select the correct code of TRUE and FALSE for given statements:

(a) Peroxide ion as well as dioxygen molecule both are paramagnetic species.

(b) In set of isomers, $\left[\mathrm{Cr}\right({\mathrm{H}}_2\mathrm{O}{)}_6]{\mathrm{Cl}}_3$ and $\left[\mathrm{CrCl}\right({\mathrm{H}}_2\mathrm{O}{)}_5]{\mathrm{Cl}}_2·{\mathrm{H}}_2\mathrm{O}$, both compounds can easily loose water molecule on treatment with conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$

(c)During transformation $\mathrm{NO}\underset{}{\to } {\mathrm{NO}}^{+}$, bond length and magnetic  behaviour decreases

(d) An ether is more volatile than alcohol both having same molecular formula

The total possible coordination isomers for the following compounds respectively are:

$$\begin{gathered} \left[\mathrm{Co}\right(\mathrm{en}{)}_3\left]\right[\mathrm{Cr}\left({\mathrm{C}}_2{\mathrm{O}}_4{)}_3\right] \\ \left[\mathrm{Cu}\right({\mathrm{NH}}_3{)}_4\left]\right[{\mathrm{CuCl}}_4\left] \\ \right[\mathrm{Ni}\left(\mathrm{en}{)}_3\right]\left[\mathrm{Co}\right({\mathrm{NO}}_2{)}_6 \end{gathered}$$

Select the incorrect match :

Select incorrect statement among the following about complex $\left[\mathrm{Cr}\right({\mathrm{NO}}_2\left)\right({\mathrm{NH}}_3{)}_5] [\mathrm{Zn}\left(\mathrm{SCN}{)}_4\right]$:

Unmatched characterstic of complex $\left[{\mathrm{PdCl}}_2\right({\mathrm{H}}_2\mathrm{O}{)}_2({\mathrm{NH}}_3{)}_2{]}^{2+}$ is :

Which of the following statement is true?

The possible geometrical isomers shown by ${\left[\mathrm{Co}\left(\mathrm{en}\right){\mathrm{Br}}_2{\mathrm{Cl}}_2\right]}^{-}$ is :

The total number of isomers of the complex, $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_3{\left({\mathrm{NO}}_2\right)}_2\left({\mathrm{NO}}_3\right)\right]$ complex is :

Which one of the following complexes exhibit chirality ?

The following complexes are given :

(1) $\mathrm{trans}-\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_4{\mathrm{Cl}}_2{]}^{+}$

(2) $\mathrm{cis}-\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_2(\mathrm{en}{)}_2{]}^{3+}$

(3) $\mathrm{trans}-\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_2(\mathrm{en}{)}_2{]}^{3+}$

(4) ${\mathrm{NiCl}}_4^{2-}$

(5) ${\mathrm{TiF}}_6^{2-}$

(6) ${\mathrm{CoF}}_6^{3-}$

Choose the correct code:

Which of the following can show geometrical isomerism?

Which of the following complex compound exhibits cis-trans isomerism?

Which of the following will have three stereoisomeric forms?

(i) $\left[\mathrm{Cr}\right({\mathrm{NO}}_3{)}_3\left({\mathrm{NH}}_3{)}_3\right]$                 (ii) ${\mathrm{K}}_3\left[\mathrm{Co}\right({\mathrm{C}}_2{\mathrm{O}}_4{)}_3]$

(iii) ${\mathrm{K}}_3\left[{\mathrm{CoCl}}_2\right({\mathrm{C}}_2{\mathrm{O}}_4{)}_2]$               (iv) $\left[\mathrm{CoBrCl}\right(\mathrm{en}{)}_2]$

(a) (iii) and (iv )     (b) (i),(iii) and (iv)       (c) (iv) only       (d) All four 

A coordination complex of type ${\mathrm{MX}}_2{\mathrm{Y}}_2$ (M-metal ion;X,Y monodentate ligands ), can have either a tetrahedral or a square planar geometry . The maximum number of possible isomers in these two cases are respectively:

The ratio of cis and trans-isomers of the complex $[{\mathrm{Ma}}_2\mathrm{bcde}{]}^{\mathrm{n}\pm }$ is: