An aromatic compound 'A' of molecules formula C7H6O2 undergoes a series of reaction as shown below. Write the structures of A,B,C,D and E in the following reactions:OR (a) Write the structures of main products when benzene diazonium chloride reacts with the following regents:(i) H3PO2 H2O (ii) CuCN/KCN (iii) H2O (b) Arrange the following in the increasing order of their basic character in an aqueous solutions: C2H5NH2,(C2H5)2NH,(C2H5)3N (c) Give a simple chemical test to distinguish between th