Which of the following comparisons is correct for $\Delta_0$ of the following complexes?
I- $[\text{Co(H}_2\text{O)}_6]^{2+}$
II- $[\text{Co(H}_2\text{O)}_6]^{3+}$
III- $[\text{Fe(H}_2\text{O)}_6]^{3+}$
IV- $[\text{Fe(CN)}_6]^{3+}$

Among the given ligands, the negative ligand is

Which of the following compounds is obtained when Bromoethane is reacted with silver acetate?

Find the structure of A in following reaction