Werner's Coordination Theory

Q.

What is the order of ionization enthalpy for $\mathrm{B},\mathrm{Al},\mathrm{and}\mathrm{Ga}$?

Q. A coordination complex compound of cobalt has the molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution. On reacting this solution with excess of $AgN{O}_3$ solution, we get two moles of $AgCl$ precipitate. The ionic formula for this complex would be:

1. $\left[Co\right(N{H}_3{)}_5\left(N{O}_2\right)]C{l}_2$
2. $\left[Co\right(N{H}_3{)}_{5}Cl\left]Cl\right(N{O}_2)$
3. $\left[Co\right(N{H}_3{)}_4\left(N{O}_2\right)Cl\left]\right(N{H}_3)Cl$
4. $\left[Co\right(N{H}_3{)}_5\left]\right(N{O}_2{)}_{2}C{l}_2$

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.

What is meant by a radical? Name the types of radicals in iron sulphide.

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.

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 secondary valency and the number of hydrogen bonded water molecule(s) in $CuS{O}_4.5H_{2}O$, respectively, are

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1. 6 and 5
2. 6 and 4
3. 4 and 1
4. 5 and 1

Q. The solution of the complex tetraamminecopper (II) sulphate in water

1. Will give the tests of $C{u}^{2+}$ ions
2. Will give the tests of $N{H}_3$
3. Will give the tests of $S{O}_4^{-2}$ ions
4. Will not give any test of the above species

Q. Which of the following exhibits highest molar conductivity?

1. $\left[Co\right(N{H}_3{)}_6]C{l}_3$
2. $\left[Co\right(N{H}_3{)}_{5}Cl]C{l}_2$
3. $\left[Co\right(N{H}_3{)}_{4}C{l}_2]Cl$
4. $\left[Co\right(N{H}_3{)}_{3}C{l}_3]$

Q. A coordination complex compound of cobalt has the molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution. On reacting this solution with excess of $AgN{O}_3$ solution, we get two moles of $AgCl$ precipitate. The ionic formula for this complex would be:

Q. Which of the following complex's aqueous solution shows maximum conductance?

1. $PtC{l}_{4.}6N{H}_3$
2. $PtC{l}_{4.}5N{H}_3$
3. $PtC{l}_{4.}4N{H}_3$
4. $\text{Equal in all of the above}$

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.

How can you name chemical compounds from their formula in the following cases? Give examples in support of your answer.

(iii) If a compound contains three elements (tertiary compound), one of which is Oxygen.

Q. The highest molar conductivity will be in case of

1. $\left[Co\right(N{H}_3{)}_{5}Cl]C{l}_2$
2. $\left[Co\right(N{H}_3{)}_{4}C{l}_2]Cl$
3. $\left[Co\right(N{H}_3{)}_6]C{l}_3$
4. $\left[Co\right(N{H}_3{)}_{3}C{l}_3]$

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

1. 4
2. \N
3. 2
4. 6

Q. Among the following, the poorest electrolytic conductor would be

1. $K_2\left[PtC{l}_6\right]$
2. $\left[Co\right(N{H}_3{)}_3\left(N{O}_2{)}_3\right]$
3. $K_4\left[Fe\right(CN{)}_6]$
4. $\left[Cr\right(H_{2}O{)}_{4}C{l}_2]Cl.2H_{2}O$

Q. An aqueous solution containing ferrous cyanide and potassium cyanide in the molar ratio of 1 : 4 is evaporated. The solid obtained is re-dissolved in water. The ion present in this solution is

1. $\left[Fe\right(CN{)}_6{]}^{4-}$
2. $\left[Fe\right(CN{)}_6{]}^{3-}$
3. $\left[Fe\right(CN{)}_3]$
4. $F{e}^{3+}$

Q. Among the following, the poorest electrolytic conductor would be

1. $K_2\left[PtC{l}_6\right]$
2. $\left[Co\right(N{H}_3{)}_3\left(N{O}_2{)}_3\right]$
3. $K_4\left[Fe\right(CN{)}_6]$
4. $\left[Cr\right(H_{2}O{)}_{4}C{l}_2]Cl.2H_{2}O$

Q. Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at ${25}^{\circ }C$ ?

1. $CoC{l}_3.6N{H}_3$
2. $CoC{l}_3.3N{H}_3$
3. $CoC{l}_3.4N{H}_3$
4. $CoC{l}_3.5N{H}_3$

Q. As per postulates of Werner's theory for coordination compound

1. Primary valency is ionizable
2. Secondary valency is ionizable
3. Both primary and secondary valencies are non-ionizable
4. Only primary valency is non ionizable

Q. From the following which is the least conducting in solution

1. $K_2\left[PtC{l}_6\right]$
2. $\left[Co\right(N{H}_3{)}_3\left(N{O}_2{)}_3\right]$
3. $K_4\left[Fe\right(CN{)}_6]$
4. $\left[Cu\right(N{H}_3{)}_4]S{O}_4$

Q. Which of the following will produce white ppt on treatment with $BaC{l}_2$ solution

1. $\left[Cr\right(N{H}_3{)}_{4}S{O}_4]Cl$
2. $\left[Cr\right(N{H}_3{)}_{4}C{l}_2]N{O}_2$
3. $\left[Cr\right(N{H}_3{)}_{4}C{l}_2]S{O}_4$
4. $Bothaandb$

Q.

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

1. CN fulfills primary valency

2. CN fulfills secondary valency

3. K is linked with secondary valency

4. K is linked with non-ionic valency

Q.

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

1. CN fulfills primary valency

2. CN fulfills secondary valency

3. K is linked with secondary valency

4. K is linked with non-ionic valency

Q. Which of the following exhibits highest molar conductivity?

1. $\left[Co\right(N{H}_3{)}_6]C{l}_3$
2. $\left[Co\right(N{H}_3{)}_{5}Cl]C{l}_2$
3. $\left[Co\right(N{H}_3{)}_{4}C{l}_2]Cl$
4. $\left[Co\right(N{H}_3{)}_{3}C{l}_3]$