Werner's Coordination Theory

Q. The primary valency of metal ion to the coordination compound $K_2\left[Ni\right(CN{)}_4]$ is

1. 4
2. 0
3. 2
4. 6

Q.

In $K_{4}Fe(CN{)}_6$

1. CN fulfills primary valency

2. K is linked with secondary valency

3. K is linked with non-ionic valency

4. CN fulfills secondary valency

Q. The coordination no. of a metal in a complex compound is

1. same as secondary valency
2. both (a) and (b)
3. same as primary valency
4. None of the above

Q. In a complex, the highest co-ordination number is

1. 8
2. 6
3. 4
4. 12

Q. A solution containing $2.675g$ of $CoC{l}_3.6N{H}_3$ (Molar Mass = $267.5g/mol$) is passed through a cation exchanger. The chloride ions obtained in solution were treated with an excess of $AgN{O}_3$ to give $4.78g$ of $AgCl$ (Molar mass = $143.5g/mol$). The formula of the complex is

1. $\left[CoC{l}_2\right(N{H}_3{)}_4]Cl$
2. $\left[CoC{l}_3\right(N{H}_3{)}_3]$
3. $\left[CoCl\right(N{H}_3{)}_5]C{l}_2$
4. $\left[Co\right(N{H}_3{)}_6]C{l}_3$

Q.

Primary and secondary valency of $Pt$ in $\left[Pt\right(en{)}_{2}C{l}_2]$ are

1. 4, 4

2. 4, 6

3. 6, 4

4. 2, 6

Q. The number of ions per mole in the complex $CoC{l}_3\bullet 4N{H}_3$ in aqueous solution will be

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

Q. One mole of the complex with molecular formula $\left[Co\right(N{H}_3{)}_{5}C{l}_3]$ gives two moles of $AgCl$ with excess of $AgN{O}_3$. The complex is

1. $\left[Co\right(N{H}_3{)}_{4}C{l}_2]Cl$
   
2. $\left[Co\right(N{H}_3{)}_{3}C{l}_3].2N{H}_3$
3. $\left[Co\right(N{H}_3{)}_{4}Cl]C{l}_2.N{H}_3$
   
4. $\left[Co\right(N{H}_3{)}_{5}Cl]C{l}_2$

Q. Which of the following forms, with an excess of $C{N}^{-}$, a complex having co-ordination number 2

1. $C{u}^{+}$
2. $A{g}^{+}$
3. $N{i}^{2+}$
4. $F{e}^{2+}$

Q. On complete reaction of $FeC{l}_3$ with oxalic acid in aqueous solution containing $KOH$, resulted in the formation of product $A$. The secondary valency of $Fe$ in the product $A$ is (Round off to the Nearest Integer ).