The shapes of four different complexes, P, Q, R and S, are shown in Table 5.1. The symbol J represents an atom or ion of a transition element. The symbol L is used to represent a monodentate ligand. [Table 5.1]

1. (a)Label one bond angle on each of complexes P, Q, R and S, and identify the size of the angle in degrees.[2]
2. (b)Identify the shapes of complexes P, Q, R and S.[2]
3. (c)Two L ligands are exchanged with two different monodentate ligands X and Y in each of complexes P, Q, R and S. Identify all the complexes which form new complexes that show geometrical isomerism.[1]
4. (d)Three L ligands are exchanged with three different monodentate ligands X, Y and Z in each of complexes P, Q and R. Identify all the complexes which form new complexes that show optical isomerism.[1]

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