Coordination Complexes

Q. The correct formula of Zeise’s salt is

1. $[PtC{l}_3.C_2{H}_6{]}^{-}{K}^{+}$
2. $[PtC{l}_2.(C_2{H}_2{)}_2{]}^{-}{K}^{+}$
3. $K^{+}[PtC{l}_3.C_2{H}_4{]}^{-}$
4. $[PtC{l}_3.C_6{H}_6]$

Q. The volume (in $\text{mL}$) of $0.1\text{M}AgN{O}_3$ required for the complete precipitation of chloride ions present in $30\text{mL}$ of $0.01\text{M}$ solution of $\left[Cr\right(H_{2}O{)}_{5}Cl]C{l}_2$, as silver chloride is close to:

1. $6\text{mL}$
2. $7\text{mL}$
3. $8\text{mL}$
4. $9\text{mL}$

Q. Which of the following is not a double salt?

1. $KCI.MgC{l}_2.6H_{2}O$
2. $FeS{O}_4.(N{H}_4{)}_{2}S{O}_4.6H_{2}O$
3. $K_{2}S{O}_4.A{l}_2\left(S{O}_4\right).24H_{2}O$
4. $4KCN.Fe(CN{)}_2$

Q.

Is nitrate ion a ligand?

Q. The ions present in the aqueous solution of potash alum are

1. only $K^{+}$ and $A{l}^{3+}$
2. only $K^{+}$ and $S{O}_4^{2-}$
3. only $A{l}^{3+}$ and $S{O}_4^{2-}$
4. All $K^{+},A{l}^{3+}$ and $S{O}_4^{2-}$

Q. Which of the following complexes is reluctant to dehydration?

1. $\left[Cr\right(H_{2}O{)}_{5}Cl]C{l}_2.H_{2}O$
2. $\left[Cr\right(H_{2}O{)}_{4}C{l}_2]Cl.2H_{2}O$
3. $\left[Cr\right(H_{2}O{)}_6]C{l}_3$
4. All of these

Q.

The power of halides of boron to act as Lewis acids decreases in the order:

1. $B{F}_3$$>$$BC{l}_3$$>$$BB{r}_3$

2. $BB{r}_3$$>$$BC{l}_3$$>$$B{F}_3$

3. $BC{l}_3$$>$$B{F}_3$$>$$BB{r}_3$

4. $BC{l}_3$$>$$BB{r}_3$$>$$B{F}_3$

Q. The addition of excess aqueous ammonia to a pink coloured aqueous solution of $CoC{l}_2.6H_{2}O\left(X\right)$ and $N{H}_{4}Cl$ gives an octahedral complex $Y$ in the presence of air. In an aqueous solution, complex $Y$ behaves as $1:3$ electrolyte. The reaction of $X$ with excess $HCl$ at room temperature results in the formation of a blue colored complex $Z$$\left(\right[CoC{l}_4{]}^{2-})$. The calculated spin only magnetic moment of $X$ and $Z$ is $3.87\text{BM}$ whereas, it is zero for complex $Y$.
Choose the correct statement among the following.

1. Hybridisation of $Y$ is $s{p}^3{d}^2$
2. Both $Z$ and $Y$ are diamagnetic in nature
3. Coordination number of $Y$ is $4$
4. Oxidation state of the central metal ion in $Y$ is $+3$

Q. Which of the following is not a double salt?

1. $KCI.MgC{l}_2.6H_{2}O$
2. $FeS{O}_4.(N{H}_4{)}_{2}S{O}_4.6H_{2}O$
3. $K_{2}S{O}_4.A{l}_2\left(S{O}_4\right).24H_{2}O$
4. $4KCN.Fe(CN{)}_2$

Q. $K_4\left[Fe\right(CN{)}_6]$ is

1. double salt
2. coordination compound
3. neutral molecule
4. None of the above

Q. Wilkinson’s catalyst is used for

1. Hydrogenation of oils
2. Hydrogenation of alkynes
3. Hydrogenation of alkenes
4. Polymerisation of alkenes

Q. Which of the following metal ion is present in Ziegler-Natta catalyst?

1. $F{e}^{2+}$
2. $Z{r}^{4+}$
3. $R{h}^{+1}$
4. $T{i}^{4+}$

Q. In the isoelectronic series of metal carbonyls, the 'M-C' bond strength is expected to increase in the order:

1. $\left[Cr\right(CO{)}_6]<[Mn(CO{)}_6{]}^{+}<[V(CO{)}_6{]}^{-}$
2. $\left[V\right(CO{)}_6{]}^{-}<\left[Cr\right(CO{)}_6]<[Mn(CO{)}_6{]}^{+}$
3. $\left[V\right(CO{)}_6{]}^{-}<\left[Mn\right(CO{)}_6{]}^{+}<\left[Cr\right(CO{)}_6]$
4. $\left[Mn\right(CO{)}_6{]}^{+}<\left[Cr\right(CO{)}_6]<[V(CO{)}_6{]}^{-}$

Q.

Potassium crystallises in a bcc structure. The co-ordination number of potassium in potassium metal is

1. 2
2. 4
3. 6
4. 8

Q. Match Column I with Column II.
$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ \text{a. Chlorophyll}& \text{(P) Rhodium}\\ \text{b. Blood pigment}& \text{(Q) Cobalt}\\ \text{c. Wilkinson catalyst}& \text{(R) Calcium}\\ \text{d. Vitamin}{B}_{12}& \text{(S) Iron}\\ & \text{(T) Magnesium}\end{array}$

1. a - T; b - S; c - P; d - Q
2. a - S; b - T; c - P; d - Q
3. a - T; b - S; c - Q; d - R
4. a - T; b - Q; c - R; d - S

Q. The metal ion present in Zeise's salt is

1. Magnesium
2. Iron
3. Platinum
4. Palladium

Q.

In the closest packing of spheres of uniform size, the ratio of radii of octahedral and tetrahedral holes is :

1. $\frac{0.732}{0.414}$

2. $\frac{0.414}{0.155}$

3. $\frac{0.732}{0.225}$

4. $\frac{0.414}{0.225}$

Q. $\left[Pl\right(N{H}_3{)}_6]C{l}_4$ complex gives

1. 4 ions
2. 3 ions
3. 2 ions
4. 5 ions

Q. The number of sigma and pi bonds in the compound respectively are

1. 19, 11
2. 19, 5
3. 35
4. 7, 3

Q. Match Column I with Column II.
$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ \text{a. Chlorophyll}& \text{(P) Rhodium}\\ \text{b. Blood pigment}& \text{(Q) Cobalt}\\ \text{c. Wilkinson catalyst}& \text{(R) Calcium}\\ \text{d. Vitamin}{B}_{12}& \text{(S) Iron}\\ & \text{(T) Magnesium}\end{array}$

1. a - T; b - S; c - P; d - Q
2. a - S; b - T; c - P; d - Q
3. a - T; b - S; c - Q; d - R
4. a - T; b - Q; c - R; d - S