Coordination Polyhedra

Q. $L{i}_{3}N+H_{2}O\to A\text{(gas)}$
$L{i}_{2}C{O}_3\stackrel{\Delta }{\to }B\text{(gas)}$
Hybridisation of the central atom in $A$ and $B$ respectively:

1. $s{p}^3,sp$
2. $s{p}^2,s{p}^3$
3. $sp,sp$
4. $s{p}^3,s{p}^3$

Q. Hexaflouroferrate(III) ion is an outer orbital complex. the number of unpaired electrons are:

1. 1
2. 5
3. 4
4. Unpredictable

Q. Total number $\sigma$ and $\pi$ bonds in carbon sub-oxide $\left(C_3{O}_2\right)$ is .....................

Q. Crystal field stabilisation energy for high spin $d^4$ octahedral complex is

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> AIPMT - 2010 Pre

1. $-1.2{\Delta }_o$
2. $-0.6{\Delta }_o$
3. $-1.8{\Delta }_o$
4. $-1.8{\Delta }_o+P$

Q.

Low spin complex of $d^6$ cation in an octahedral field will have which of the following energy?

1. $\frac{-12}{5}{\Delta }_0+P$
2. $\frac{12.5}{5}{\Delta }_0+3P$
3. $\frac{-12}{5}{\Delta }_0+3P$
4. $\frac{-2}{5}{\Delta }_0+2P$

Q. The number of $\sigma$ and $\pi -$ bonds in $F{e}_2(CO{)}_9$, respectively, are

1. $22\sigma$ and $15\pi$
2. $15\sigma$ and $8\pi$
3. $22\sigma$ and $16\pi$
4. $23\sigma$ and $15\pi$

Q. $\begin{array}{ccc}& \text{Column - I}& \text{Column - II}\\ i.& \left[Ni\right(CO{)}_4]& \text{Planar octahedral, diamagnetic}\\ ii.& \left[Fe\right(NO\left)\right(H_{2}O{)}_5{]}^{2+}& \text{Planar, paramagnetic}\\ iii.& \left[Co\right(N{O}_2{)}_6{]}^{3-}& \text{Octahedral, diamagnetic}\\ iv.& \left[Cu\right(N{H}_3{)}_4{]}^{2+}& \text{Planar octahedral, paramagnetic}\\ & & \text{Octahedral, paramagnetic}\end{array}$

1. $i-r,ii-s,iii-p,iv-q$
2. $i-r,ii-p,iii-s,iv-q$
3. $i-r,ii-s,iii-q,iv-t$
4. $i-r,ii-p,iii-q,iv-t$

Q. Crystal field stabilisation energy for high spin $d^4$ octahedral complex is

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> AIPMT - 2010 Pre

1. $-0.6{\Delta }_o$
2. $-1.8{\Delta }_o$
3. $-1.8{\Delta }_o+P$
4. $-1.2{\Delta }_o$

Q.

Column -$I$	Column -$II$
$\left(I\right)N_2{O}_5\left(s\right)$	$\left(P\right)$ Cation has $s{p}^3{d}^2$ hybridised central atom
$\left(II\right)IC{l}_3\text{(Molten)}$	$\left(Q\right)$ Anion has square planar shape
$\left(III\right)PB{r}_5\left(s\right)$	$\left(R\right)$ Anion has trigonal planar shape
$\left(IV\right)Xe{F}_6\left(s\right)$	$\left(S\right)$ Cation is linear
	$\left(T\right)$ Cation has tetrahedral shape

Which of the following option has the correct combination considering List-$I$ and List-$II$.

1. $I,P$
2. $II,Q$
3. $III,S$
4. $IV,T$

Q. $NiC{l}_2{P\left(C_2{H}_5{)}_2\right(C_6{H}_5)}_2$ exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of $N{i}^{2+}$ in the paramagnetic and diamagnetic states are respectively

1. Square planar and square planer
2. Square planer and tetrahedral
3. Tetrahedral and tetrahedral
4. Tetrahedral and square planer

Q. Which has highest paramagnetism?

1. ${\left[Fe{\left(H_{2}O\right)}_6\right]}^{2+}$
2. ${\left[Cr{\left(H_{2}O\right)}_6\right]}^{3+}$
3. ${\left[Zn{\left(H_{2}O\right)}_6\right]}^{2+}$
4. ${\left[Cu{\left(H_{2}O\right)}_6\right]}^{2+}$

Q. Which of the following is paramagnetic octahedral complex?

1. ${\left[Co{F}_6\right]}^{3-}$
2. ${\left[Cu{\left({NH}_3\right)}_4\right]}^{2+}$
3. $\left[Ni{\left(CO\right)}_4\right]$
4. ${\left[Co{\left({NH}_3\right)}_6\right]}^{3+}$

Q. The number of sigma bonds in ethane formed by the overlap of $s{p}^3$ and $s$ orbitals is:

1. $5$
2. $6$
3. $4$
4. $7$

Q. Pick out the correct statement with respect $\left[Mn\right(CN{)}_6{]}^{3-}:$

1. It is $d^{2}s{p}^3$ hybridised and octahedral
   
2. It is $ds{p}^2$ hybridised and square planar
3. It is $s{p}^3{d}^2$ hybridised and octahedral
4. It is $s{p}^3{d}^2$ hybridised and tetrahedral

Q. Arrange the following species in the increasing order of their magnetic moment.
$\left(I\right)VC{l}_3\left(II\right)VOS{O}_4\left(III\right)N{a}_{3}V{O}_4\left(IV\right)\left[V\right(H_{2}O{)}_6]S{O}_4.H_{2}O$

1. $III<II<I<IV$
2. $III<IV<II<I$
3. $II<III<I<IV$
4. $IV<I<II<III$

Q. Which of the following is paramagnetic in nature?

1. $N_2$
2. $F_2$
3. $K{O}_2$
4. None of these

Q. Match the complex in List-I with the number of unpaired electrons given in List-II.

Q. Assertion :Statement - 1 : $PO{F}_3$ exist but $NO{F}_3$ does not exist. Reason: Statement - 2 : 'P' can form five bonds by expanding its octet while 'N' can not expand its octet to form five bonds.

1. Statement - 1 is true, statement - 2 is true and statement - 2 is correct explanation for statement - 1.
2. Statement - 1 is true, statement - 2 is true and statement - 2 is NOT the correct explanation for statement - 1.
3. Statement - 1 is true, statement - 2 is false.
4. Statement - 1 is false, statement - 2 is true.

Q. The shape of $Cl{O}_3^{-}$ is

1. Trigonal planar
2. Pyramidal
3. Tetrahedral
4. Square planar

Q. Which of the following complex compound(s) is/are paramagnetic and low spin?

1. $K_3\left[Fe\right(C{N}_6\left)\right]$
2. $\left[Cr\right(N{H}_3{)}_6{]}^{3+}$
3. $\left[Mn\right(CN{)}_6{]}^{4-}$
4. $\left[Ni\right(CO{)}_4{]}^0$

Q. Number of sigma and pi bonds in $Cl{O}_3^{-}$ ion are:

1. $2\sigma$ and $2\pi$
2. $3\sigma$ and $3\pi$
3. $3\sigma$ and $2\pi$
4. $2\sigma$ and $3\pi$