NEET Practice Questions (MCQs) with Answers & Solutions

It is a ligand substitution reaction.

 ${\mathrm{NH}}_3$ is a relatively strong field ligand while ${\mathrm{H}}_2\mathrm{O}$ is a weak ligand 

During the reaction , there is a change in colour from light blue to dark blue 

 $\left[\mathrm{Cu}\right({\mathrm{NH}}_3{)}_4{]}^{2+}$, has a tetrahedral structure and is paramagnetic

 $\left[\mathrm{V}\right({\mathrm{NH}}_3{)}_6{]}^{3+}$                              :           ${\mathrm{d}}^2{\mathrm{sp}}^3$

 $\left[{\mathrm{CrCl}}_3\right({\mathrm{NMe}}_3{)}_3]$                         :            ${\mathrm{d}}^2{\mathrm{sp}}^3$

 $\left[\mathrm{Cu}\right(\mathrm{CN}\left)\right({\mathrm{NO}}_2\left)\right({\mathrm{NH}}_3\left)\right(\mathrm{py}\left)\right]$     :            ${\mathrm{dsp}}^2$

 ${\mathrm{K}}_3\left[\mathrm{Co}\right(\mathrm{ox}{)}_3]$                             :             ${\mathrm{sp}}^3{\mathrm{d}}^2$

4,4,4     

2,2,2       

2,2,4       

4,2,4

 $\left[\mathrm{Co}\right({\mathrm{NO}}_2\left)\right({\mathrm{H}}_2\mathrm{O}\left)\right(\mathrm{en}{)}_2]{\mathrm{Cl}}_2 , [\mathrm{Cocl}\left({\mathrm{NO}}_2\right)\left(\mathrm{en}{)}_2\right]\mathrm{Cl}·{\mathrm{H}}_2\mathrm{O}$ : Hydrate isomerism

 $\left[\mathrm{Cu}\right({\mathrm{NH}}_3{)}_4\left]\right[{\mathrm{PtCl}}_4] , [\mathrm{CuCl}\left({\mathrm{NH}}_3{)}_3\right] \left[{\mathrm{PtCl}}_3\right({\mathrm{NH}}_3\left)\right]$         : Co-ordination isomerism

 $\left[\mathrm{Ni}\right(\mathrm{CN}\left)\right({\mathrm{H}}_2\mathrm{O}\left)\right({\mathrm{NH}}_3{)}_4]\mathrm{Cl} , [\mathrm{NiCl}\left({\mathrm{H}}_2\mathrm{O}\right)\left({\mathrm{NH}}_3{)}_4\right]\mathrm{CN}$        : Ionization isomerism

 $\left[\mathrm{Cr}\right({\mathrm{NO}}_2\left)\right({\mathrm{NH}}_3{)}_5] [{\mathrm{ZnCl}}_4] , [\mathrm{Cr}\left({\mathrm{NO}}_3\right)\left({\mathrm{NH}}_3{)}_5\right] \left[{\mathrm{ZnCl}}_4\right]$   : Linkage isomerism  

It shows co-ordination isomerism

It shows optical activity 

It shows linkage isomerism

IUPAC name of the compound is Pentaaminenitrito-N-chromium (III) tetrathiocyanato-S-zincate(II) 

Diamagnetic                               

Low spin

Geometrical isomerism               

Fac. and Mer. form

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

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

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

 ${\mathrm{NiCl}}_4^{2-}$

(5) ${\mathrm{TiF}}_6^{2-}$

(6) ${\mathrm{CoF}}_6^{3-}$

Choose the correct code:

(a) (1),(2) are optically active, (3) is optically inactive

(b) (2) is optically active ; (1), (3) are optically inactive

(c) (4), (5) are coloured and (6) is colourless

(d) (4) is coloured and (5),(6) are colourless

 $\left[\mathrm{CoCl}\right({\mathrm{NH}}_3{)}_4\left({\mathrm{H}}_2\mathrm{O}\right)]$                     

 $\left[{\mathrm{CoCl}}_3\right({\mathrm{NH}}_3{)}_3]$

 $\left[{\mathrm{CoCl}}_2\right({\mathrm{NH}}_3{)}_4]$                             

All of these

(iii) and (iv )     

(i),(iii) and (iv)       

(iv) only       

All four 

1 and 2     

2 and 1     

1 and 3       

3 and 2