Optical Isomerism in Octahedral Coordination of Monodentate Ligands

Q. Which of the following complex species is not expected to exhibit optical isomerism?

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

Q. Which of the following will show optical activity?

1. $K_2\left[PtBrClFI\right]$
2. $\left[Cr\right(en{)}_3]C{l}_3$
3. $\left[Co\right(N{H}_3{)}_4\left(Cl{)}_2\right]N{O}_3$
4. $\left[Fe\right(N{H}_3{)}_3\left(Cl{)}_3\right]$

Q. Which of the following does not show optical isomerism?

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

Q. Which of the following isomersim is/are shown by then complex $\left[CoC{l}_2\right(OH{)}_2\left(N{H}_3{)}_2\right]Br$ ?

1. Ionization
2. Optical
3. Geometrical
4. Linkage

Q. The correct statement(s) about the compound given below is (are)
(2008)

1. The compound is optically active
2. The compound possesses centre of symmetry
3. The compound possesses plane of symmetry
4. The compound possesses axis of symmetry

Q. Which one of the following octahedral complexes will not show geometrical isomerism?(A and B are monodentate ligands )

1. $\left[M{A}_4{B}_2\right]$
2. $\left[M{A}_{5}B\right]$
3. $\left[M{A}_2{B}_4\right]$
4. $\left[M{A}_3{B}_3\right]$